Program

Wednesday, 6 November, 2019 10:00-10:20  [ J-OCTA Users Conference ]

Overview and outlook of J-OCTA

Dr. Ozawa, Taku

JSOL Corporation

Trends of J-OCTA's surrounding environment and development are introduced.

Wednesday, 6 November, 2019 10:20-11:20  [ J-OCTA Users Conference ]

Latest Functions of J-OCTA (1)

Ms. Yoshida, Hideyo

JSOL Corporation

I introduce the latest functions in J-OCTA V5.0 (May 2019) and V5.1(Sept. 2019). The release plans for next year (V6.0 and V6.1) are also introduced.
In this presentation, I will focus on the basic functions and modeling functions of J-OCTA.

Latest Functions of J-OCTA (2)

Mr. Ohata, Kosuke

JSOL Corporation

We released J-OCTA V5.0 in June and V5.1 in September this year. In addition, we are planning to release V6.0 next March and V6.1 next summer. In this presentation, we introduce the latest function packaged in J-OCTA and the future plan.

Wednesday, 6 November, 2019 11:20-11:50  [ J-OCTA Users Conference ]

Molecular dynamics simulation of thermosetting polymer materials by using J-OCTA

Dr. Matsubara, Norie

Research & Development Div. Basic Technology Integration Center
NIPPON STEEL Chemical & Material CO., LTD.

Thermosetting polymer materials, especially epoxy resin, are developed as matrix resin in carbon fiber reinforced plastic expected to be used for aircraft and other transportation equipment structural materials. We are using J-OCTA? to clarify the relationship between molecular structure and basic physical, thermal and mechanical properties of resin. Additionally, we believe that predicting resin's properties by molecular dynamics simulation will lead to the promotion of material development. Comparing with the results of actual curing experiments, we consider the simulation results of estimating various properties of epoxy resin by using the all-atom and the reaction modeling tools provided in J-OCTA for VSOP engine.

Wednesday, 6 November, 2019 10:00-11:50  [ Moldex3D Technical Conference ]

Technical consultation

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Wednesday, 6 November, 2019 12:50-13:20  [ J-OCTA Users Conference ]

SIESTA code in SIMUNE’s Atomistic Simulation Advanced Platform (ASAP-SIESTA)

Dr. Federico Marchesin

SIMUNE Atomistics

Mr. Daniel Simo

SIMUNE Atomistics

SIMUNE is a company expert in ATOMISTIC SIMULATIONS. We provide consultancy and computer simulation services aimed to develop innovative technology based on the properties of materials at the atomic scale. In 2015, we established a strategic partnership with SIESTA, code for which SIMUNE offers simulation support packages and other related material.
SIMUNE will address its synergy with SIESTA and the latest developments around the code. Within the SIESTA-PRO project launched in 2017, SIMUNE is supporting the development of new SIESTA functionalities, developing new material for the code and generating new tools to facilitate its use.
Moreover, SIMUNE will present its software ASAP (Atomistic Simulation Advanced Platform). ASAP is composed of a set of tools and modules developed around different software packages, including SIESTA, to facilitate their use for academical and industrial users. ASAP also automatizes the workflow needed to simulate particular material properties and selected industrial problems.

Wednesday, 6 November, 2019 12:50-13:30  [ Moldex3D Technical Conference ]

Introduction to Moldex3D Studio

Mr. Takahashi, Daisuke

JSOL Corporation

Moldex3D, which is being developed with the goal of upgrading once a year, has added various functions in this version upgrade. As one of them, Moldex3D Studio will be released as a new platform from this new version R17. Moldex3D Studio, which integrates pre / solver / post to improve convenience, reviews issues on conventional platforms and further improves the efficiency of user analysis and evaluation. We will introduce the outline and functions of the new platform.

Wednesday, 6 November, 2019 13:20-14:20  [ J-OCTA Users Conference ]

Keynote Speech

Computing Material Properties with SIESTA

Prof. Pablo Ordejón

CSIC Research Professor
Catalan Institute of Nanoscience and Nanotechnology

I will give a brief introduction to Density Functional Theory (DFT), a theoretical approach that has allowed a huge advance in the fundamental understanding of the properties of materials. DFT uses quantum mechanics to predict the behavior of materials from first-principles, without having to resort to experimental information.

DFT has had a tremendous impact on fundamental research (Prof. Walter Kohn won the 1998 Nobel Prize for Chemistry for its development). Its use in the industrial environment has been less intense, as industrial problems generally involve complex materials properties at different length and time scales, which are not straightforward to address with atomistic methods and models. However, the availability of powerful computers, the development of theoretical methods that allow for DFT to handle systems with a very large number of atoms, and the advances in linking DFT with models that expand to larger scales (via multi-scale approaches) is changing this situation.

In this talk, I will present SIESTA, one of the most widely used codes to perform DFT simulations in materials. SIESTA is particularly efficient and is able to handle systems with a very large number of atoms, as its computational cost scales favorably as the number of atoms is increased (even linearly). SIESTA has a number of specific capabilities that also makes it very attractive for industrial applications, such as the possibility of simulating the electric characteristic of nanodevices, or to link to larger scales through QM/MM methodologies. It also performs particularly well in large supercomputers.

I will describe the main features of SIESTA, and illustrate them with specific examples from the work that my group has done during the last years. These will include 2D materials, the study of magnetic materials, vibrational spectra, thermal transport, etc.

Wednesday, 6 November, 2019 13:30-14:50  [ Moldex3D Technical Conference ]

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Wednesday, 6 November, 2019 14:20-14:50  [ J-OCTA Users Conference ]

Molecular modeling of layer structure of silane coupling agent modified silica surface.

Associate Prof. Okada, Kenta

Associate Professor, Collaborative Research Laboratory
Graduate School of Engineering
Hiroshima University

Silane coupling agents are one of the representative interfacial adhesion improvement technologies essential for the creation of composite materials. It is generally understood that the mechanism of action is that the silane coupling agent molecule itself serves as a support to crosslink organic and inorganic materials. However, in recent years, it has been suggested that the boundary layer formed by aggregation and linking of silane coupling agent molecules also plays a major role, but the details have not been elucidated yet. Therefore, in order to clarify the layer structure of the silane coupling agent molecules formed on the substrate, the density functional theory calculation by Siesta is used to adsorb and bind multiple silane coupling agent molecules to the inorganic substrate. We analyzed the molecular morphology of, and clarified typical binding modes and interactions.

Wednesday, 6 November, 2019 15:20-15:50  [ J-OCTA Users Conference ]

Machine learning functions after version 6.0

Mr. Kakemoto, Yoshitsugu

JSOL Corporation

J-OCTA version 5.0 introduced QSPR function using deep learning. J-OCTA version 5.1 released in this September has also made some improvements. We plan to improve the machine learning QSPR functions and add new functions as follows.
- Function improvement
・ Response to function discrimination problems
・Increase the number of user-specified hyper parameters
・ Visualization of learning process
・ Tensorfow 2.0 compatible
・ Auto tuning of hyper parameters
- New function
・ Transfer learning: Corresponds to a small amount of learning data.
・ Inverse problem: Estimate structure from physical properties.

Wednesday, 6 November, 2019 15:20-15:50  [ Moldex3D Technical Conference ]

Introduction of Moldex3D application in NICHIRIN ~Application into design~

Mr. Okuyama, Shinsuke

Manager
Design Group, Technical Department
NICHIRIN Co., Ltd.

Mr. Muaz bin Abdul Wahab

NICHIRIN Co., Ltd.

In the development of hose assembly set which is our company main product, CAE has been increasingly used to speed up the development and also as a basis for making proposals to the customers. Recently, instead of conventional metal fitting, there has been increase in demand for plastic fitting hose sets due to the weight reduction and cost down merits. In order to reduce plastic part development time and cost, it is necessary to predict the defects and apply countermeasures before the mold being manufactured. Since the adaptation of Moldex3D in 2016, our company utilizes both plastic injection analysis and structure analysis into our product design. In this presentation , water hose plastic fitting will be introduced as our company CAE application example.

Wednesday, 6 November, 2019 15:50-16:50  [ J-OCTA Users Conference ]

Keynote Speech

All-atom Molecular Dynamics Study of Impact Fracture

Dr. Fujimoto, Kazushi

Assistant Professor
Department of Materials Chemistry, Graduate School of Engineering
Nagoya University

The ductile and brittle properties of plastic materials lead to different behaviors when material failure occurs. This is crucial to applications and development of existing and new plastic materials, but its atomistic origin is usually unavailable from experimental observations. Therefore, we used all-atom molecular dynamics simulations to study the material failure of polycarbonate (PC) and polymethyl methacrylate (PMMA) under uniaxial pulling condition using the potential energy function in the Morse function form that describes bond breaking developed in our research group. Cavitation in the PMMA system was occurred after the maximum stress at strain = 0.1. Therefore, PMMA does not undergo strain hardening. Brittle rupture occurs in PMMA system right after the stress goes beyond the maximum stress. We successful showing the brittle rupture of PMMA from the view point of molecular level. On the other hand, in the PC system, the cavitation didn't occur and the strain softening and hardening were observed. Therefore, the rupture of PC system shows the ductile.
We investigated sectional area, order parameter and trans ratio of PC and PMMA and other properties along the uniaxial pulling to understand the molecular origin of the brittleness and ductility. All these suggested that PC undergoes conformational changes much more easily than PMMA. Compared to PMMA, PC can reduce the x, y dimensions, and align molecular chains to the Z-axis. In this way, the PC system can overcome the tendency to form void upon pulling, and the stress is spread over more molecular chains so that the system can tolerate much higher stress than PMMA. We also investigated the reason PC can undergo conformational changes more easily than PMMA. We used shift factors and time temperature superposition to evaluate the energy barrier of the trans-cis transformation that characters the easiness of main chain movement. The energy barrier of PC is c.a. 18 kJ/mol, which is smaller than c.a. 32 kJ/mol of PMMA. From direct comparison of stress contributions from various energetic terms, we found that strain softening and hardening originate from the combination of changes in bonded structure and van der Waals interactions respectively.

Wednesday, 6 November, 2019 15:50-16:20  [ Moldex3D Technical Conference ]

Approach to high accuracy in Moldex3D

Mr. Inaba, Hideyuki

President
Asahi Kasei Plastics Vietnam

The importance of the accuracy of Moldex3D is increasing year by year in conducting various analyzes considering fiber orientation. This time, we will introduce the results of study the influence on matirial data and mesh accuracy.

Wednesday, 6 November, 2019 16:20-17:20  [ Moldex3D Technical Conference ]

Introduction to Moldex3D Global Success Stories

Mr. Sean Wang

JSOL Corporation

Dr. Sakoda, Kentaro

JSOL Corporation

The "Moldex3D Technology Conference" is held annually as a global user conference. In June 2019, it was held for the first time in Asia and was held in Shanghai. In addition to the presentation of more than 20 sessions, 200 participants gathered, and it was a great place to exchange experiences and opinions. We will share information about overseas use cases with users of Moldex3D in Japan and introduce the contents of session presentations.

Wednesday, 6 November, 2019 16:50-17:20  [ J-OCTA Users Conference ]

Fragment Molecular Orbital Based Parametrization Procedure for Mesoscopic Structure Prediction

Dr. Okuwaki, Koji

Research Associate
College of Science
Rikkyo University

In the analyses of miscibility behaviors of macromolecules and polymers, dissipative particle dynamics (DPD) simulations are generally performed. In these simulations, the so-called χ parameters describing the effective interactions among particles are crucial. It has been known that such parameters can be obtained within the classical or empirical force field frameworks. However, there is a potential problem that charge transfer and polarization occasionally occur. Additionally, satisfactory reference parameters are not available for some cases. Therefore, we developed a new procedure to evaluate the set of parameters by using the ab initio fragment molecular orbital (FMO) method which can provide the set of interaction energies among segments as polymer units. In this presentation, we report the purpose of development, the theoretical background, and the outline of software system named FCEWS (FMO-based Chi-parameter Evaluation Workflow System).

Thursday, 7 November, 2019 10:15-11:15  [ LS-DYNA Users Conference ]

Special Speech

30 years of car crash simulation at Toyota

Dr. Yasuki, Tsuyoshi

Project general manager
Advanced R&D and Engineering Company, Advanced Vehicle Engineering Development Div.
TOYOTA MOTOR CORPORATION

Car crash simulation was initiated about thirty years ago and has been improved by various breakthrough technologies. Development of these technologies are reviewed and their contributions to passive safety performances are discussed.

Thursday, 7 November, 2019 11:15-12:15  [ LS-DYNA Users Conference ]

Keynote Speech

Can Academics in Structural Mechanics Survive? - Mechanical Viewpoint and Creativity -

Prof. Aoki, Takahira

Department of Aeronautics and Astronautics, Graduate School of Engineering
University of Tokyo

Engineering has a wide variety of research fields. Though the structural mechanics being one of these vast areas of study, it is allotted the fundamental roles to sustain and maintain functions of almost all of the man-made structures. Thorough understanding of 'mechanics' should be the underlying background of structural mechanics. However there seems to be concerns of undervaluing trend of the importance of the mechanics viewpoint. This is partly due to the advances in computational tools or utilization of artificial intelligence, making virtual simulations and assessments readily available. In the presentation, the usefulness of the 'mechanics' way of approach will be focused in, invoking the examples that have been tackled by the presenter mainly in the field of aerospace structures. It will be shown how the approach can contribute to the resolutions of the structural malfunctions or to the creations of the innovative ideas. This presentation will hopefully be of some help to the future development of the structural mechanics.

Thursday, 7 November, 2019 10:00-12:15  [ SIESTA Seminar ]

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Thursday, 7 November, 2019 13:15-13:45  [ LS-DYNA Users Conference : Automotive ]

Prediction of Ductile Fracture Propagation of High Strength Steels by Non-local XFEM

Mr. Sato, Kentaro

Senior Researcher
Steel Research Center, Forming Technology Research Dept.
JFE Steel Corporation

Mr. Okada, Hideyuki

Chief Engineer
Department 2 Technology Development Division 9
Honda R&D Co.,Ltd.

Initiation and propagation of ductile fractures in crashed automotive components using high strength steels are investigated in order to understand the mechanism of the fracture propagation. In this study, 3-point bending tests are carried out with a hat-shaped part which have a notch and a hole to induce fracture. The experimental results indicate that the location of the hole have influence on direction of fracture propagation. Based on the experimental results, FE simulation is carried out for the 3-point bending deformation. In the numerical calculation, general FEM method and extended finite element method (nonlocal XFEM) are used to investigate the possibilities of the nonlocal XFEM in the crash simulation.

Thursday, 7 November, 2019 13:15-13:45  [ LS-DYNA Users Conference : Material Modeling ]

Study on the identification method for non-linear material properties

Mr. Takekoshi, Kunio

Manager
Engineering
Terrabyte

Identification of thermoplastic material data for CAE simulation requires a lot of time. This is because most of the materials show non-uniform deformation behavior and because it is challenging to precisely predict the non-uniform deformation with CAE simulation. To reduce the identification time, the author proposed a combination of the Bezier curve and optimization program for the identification method of material properties. However, the conversion from a material test result to the Bezier curve was not automated. Thus, the proposed method was not freely used by anyone. In this presentation, a modified method to overcome the above problem will be proposed where a thermoplastic model "DSGZ" is modified, and where DSGZ parameters are initially identified using simplex method and then optimized to fit material test result using CAE simulation.

Thursday, 7 November, 2019 13:15-13:45  [ LS-DYNA Users Conference : Drop / Impact ]

Development of fall strength design method for portable products

Mr. Morimoto, Jun

Group Manager
Corporate Strategic Product & Technology Planning Group Grobal Monozukuri Enginnering Center Elemental Engineering Group
Toshiba Tec Corporation

A portable product such as a small printer is required to have a strength that does not break even if the user accidentally drops it. In the case of a drop collision, complex deformation occurs in a very short time. In particular, in the case of a portable product, it is assumed that the product collides with various postures which affect with deformation. For this reason, a design method is required that can predict the falling collision phenomenon and ensure the strength even in the collision posture that is most easily damaged. Therefore, we have utilized a fall strength design guideline into which we have integrated Toshiba Gr‘s know-hows and new ones obtained recently. We also have used numerical analysis to evaluate strength in design stage. In addition, the new functions of JVISON, which efficiently search for fragile collision postures, were developed with JSOL and applied to product development. As a result, we could reduce the number of reversion design.

Thursday, 7 November, 2019 13:15-13:45  [ LS-DYNA Users Conference : THUMS ]

TBA

Prof. Sakai, Shinsuke

Visiting Professor
Institute of Advanced Sciences
Yokohama National University

Crew injury risk prediction method due to the transient dynamic load such as the excessive water landing speed, the explosion overpressure of the launch abort system (LAS) are investigated in this study. An anthropomorphic test device (ATD) model based on the multi-body dynamics is suitable to cover the wide range of conditions. In addition, an human finite element model is employed for more detailed crew injury risk analysis. Detailed research efforts are needed for the crew safety of human space flight since a wider range of the magnitude and the direction of the impact load should be considered. This presentation shows the human injuries evaluation using finite element model. The validity of brain injury criteria BrIC is investigated and new risk curve for BrIC suitable for LAS environment is finally proposed.

Thursday, 7 November, 2019 13:15-13:45  [ Digimat Technical Conference ]

Introduction of CAE Solution for Fiber Reinforced Plastics

Mr. Oura, Hitoshi

JSOL Corporation

JSOL promotes the development of composite material analysis technology using various products we provide. In this presentation, we introduce the latest development trends.

Thursday, 7 November, 2019 13:15-13:45  [ SIESTA Seminar ]

Materials Simulation using SIESTA

Mr. Nitta, Hiroya

JSOL Corporation

Density Functional Theory (DFT) is an indispensable simulation technique to investigate electronic structures of nanoscale materials. Based on the interface between J-OCTA and SIESTA, a DFT software, we have been developing the execution function of nanoscale simulations and methodologies of combination use of SIESTA and molecular dynamics simulations. Outlook of the software and simulation methods development will be reported.

Thursday, 7 November, 2019 13:50-14:20  [ LS-DYNA Users Conference : Automotive ]

★Title

Mr. Miyamoto, Kenji

Advanced Materials and Processing Laboratory Research Division
Nissan Motor Co., Ltd.

★Detail

Thursday, 7 November, 2019 13:50-14:20  [ LS-DYNA Users Conference : Material Modeling ]

Pedestrian Protection CAE Analysis by Using 4a IMPETUS

Mr. Ito, Osamu

Honda R&D Co.,Ltd.

In order to reduce casualties in traffic accidents, vehicle safety performance is evaluated by each country's regulation and third party organization, and automobile manufacturers are required to design safe vehicles. Especially in recent years, an increasing number of countries have introduced pedestrian protection tests in order to reduce pedestrian casualties. Since the pedestrian protection test is affected by plastic parts used for exterior parts, CAE prediction accuracy of plastic parts is important for verification of pedestrian protection performance. However, plastic parts have many variations in material properties, and it often takes time to create a material card. Therefore, in this study, 4a IMPETUS was used to shorten the material card creation time and improve the pedestrian protection CAE accuracy.

Thursday, 7 November, 2019 13:50-14:20  [ LS-DYNA Users Conference : Drop / Impact ]

Analysis precision improvement of the drop impact simulation

Mr. Mizuno, Naoki

Deputy manager
Digital Engineering Section Total Quality Management Promotion Department Business Management Division
RICOH TECHNOLOGIES CO.,LTD.

There is the examination called the drop impact test (also called "the packing freight test"). This examination adds a fall shock to a packed product, and to evaluate the cushioning characteristics of the packaging and the resistance to impact of a product. This examination is carried out using an actual machine. Consequently, that when a problem occurs, often need time for measures, and a development period and cost increase; have a problem. Therefore, with the goal of replacing this drop impact test with simulation, We carry out an action to analysis precision improvement of the drop impact simulation. Because we utilized technique of the quality engineering society this time and came to be able to detect all problems (damage of the part) that occurred in an actual machine examination by simulation, we introduce this case studies.

Thursday, 7 November, 2019 13:50-14:20  [ LS-DYNA Users Conference : THUMS ]

ATHUMS Application for Study of Occupant Kinematics in Automated Driving Vehicles and THUMA Update Plan

Mr. Hayashi, Shigeki

Group Manager
Advanced Vehicle Engineering Development Div.
TOYOTA MOTOR CORPORATION

It is said that traffic accidents will still remain in a future traffic society in which autonomous vehicles and conventional vehicles coexist. In addition, when assuming an autonomous car, it is conceivable that the occupant takes various postures such as comfortable posture. On the other hand, since the current crash dummy can not cope with various postures, analysis using a human body model is expected. In this study, a human body model "THUMS" was applied to investigate occupant kinematics of various occupant postures assuming a frontal collision accident of an autonomously driven vehicle. Usefulness of using THUMS was demonstraited. Furthermore, THUMS update plan was introduced aiming to predict injury of unconventional seating positions in autonomous driving vehicles.

Thursday, 7 November, 2019 13:50-14:55  [ Digimat Technical Conference ]

Keynote Speech

Numerical Simulation in Composite Matertials

Associate Prof. Koyanagi, Jun

Department of Materials Science and Technology
Tokyo University of Science

Introducing various numerical simulations of CFRP. In particular, we will explain in detail the numerical simulation methods related to strength and durability. In the past, much research on thermosetting resin CFRP has been undertaken. Some points to note when applying this to CFRP thermoplastic resin are also introduced. I would like to introduce a few numerical simulations related to ultrasonic welding of thermoplastic CFRP.

Thursday, 7 November, 2019 13:50-14:55  [ SIESTA Seminar ]

Keynote Speech

Computing Material Properties with SIESTA, Case Studies and New Features under Development

Prof. Pablo Ordejón

CSIC Research Professor
Catalan Institute of Nanoscience and Nanotechnology

This talk will give an account of the properties of materials that can be computed with the SIESTA DFT software. The description will be done using examples of case studies done during the past years. I will also describe the new features that are currently being developed and which will be available for the users in the next releases of SIESTA.

Thursday, 7 November, 2019 14:25-14:55  [ LS-DYNA Users Conference : Automotive ]

One of the efficient method for LS-DYNA condition setting in automotive seat development

Mr. Masuda, Tadanori

CAE Section Design Department
TS TECH Co.,Ltd.

There are many strength requirements for the automotive seat, and we are using LS-DYNA from the initial design phase to satisfy them. In the recent years, the accurate results are required, and our FE models become large in scale and complicated day by day. So CAE engineers take lots of time to complete FE models. Today I introduce one of the example to reduce working hours and human errors by creating a template for condition setting when multiple engineers are working together.

Thursday, 7 November, 2019 14:25-14:55  [ LS-DYNA Users Conference : Material Modeling ]

Study on Ductile Crack Propagation Prediction for Advanced High Strength Steels

Mr. Kanemoto, Shunsuke

Engineering Analysis Group No.3, MBD Innovation Dept.
Mazda Motor Corporation

★Detail

Thursday, 7 November, 2019 14:25-14:55  [ LS-DYNA Users Conference : Drop / Impact ]

Drop Simulation of Film Packaging Container by ALE Fluid-Structure Coupling Analysis

Mr. Yokochi, Yuto

Fundamental Technology Research Laboratory
TOPPAN PRINTING CO.,LTD. Technical Research Institute

Standing pouches, used for detergent refills, etc., are self-supporting pouches that are excellent for displays at stores, convenient, and resource-saving. A standing pouch has a structure in which two side films and one bottom film are bonded together by heat sealing (heat fusion). If the toughness and heat seal strength of the material are insufficient, bag breakage due to the impact of being dropped will be a real problem. In this study, we conducted a drop simulation of a standing pouch containing liquid using the ALE fluid-structure coupling analysis of LS-DYNA, and investigated the effects of drop conditions and bag structure on drop behavior.

Thursday, 7 November, 2019 14:25-14:55  [ LS-DYNA Users Conference : THUMS ]

Efficient pre-simulation method in THUMS application with Odyssee JSOL Corporation

JSOL Corporation

THUMS is one of the most precise human model for geometry, mechanical response and human reaction in crash analysis. Corresponding to improvement of simulation accuracy, the model size is getting larger and larger. This means that calculation cost is getting higher as well. In case of sled analysis with THUMS, pre-simulation like positioning and seating is required to get more realistic simulation results. This pre-process makes turnaround time of sled analysis 2 or 3 times larger than using FE dummy model.
Reduced order model (ROM) approach has possibility to reduce this time consuming process by using principal component analysis. ROM is one of the non-linear response function based on some input data as training data set. Unlike usual machined learning approach, ROM has physical meaning and this can require less number of training data sets.

Thursday, 7 November, 2019 15:25-15:55  [ LS-DYNA Users Conference : New Field ]

Shape design of thin-walled PET refill bottles using LS-DYNA

Mr. Sadaie, Megumi

Assistant Research Manager
Container and Packaging Engineering Research Laboratories
LION CORPORATION

Since many strength requirements are required for automotive interior parts, we have been conducting analysis with LS-DYNA through it before, and working to prevent troubles at the initial design stage. Since several years ago, we have been constructing analysis technics for the operating force of switches such as consoles and glove boxes. The operating force of the switch mechanism parts consists of composite elements such as springs, gear dampers, and sliding parts, and it is possible to predict the load at the individual element level, but there are issues with analytic precision and calculation cost at the composite. This time, we studied the analytic precision improvement method for these composite models. We will report our efforts to improve accuracy in this lecture.

Thursday, 7 November, 2019 15:25-15:55  [ LS-DYNA Users Conference : Joint Modeling ]

Application of LS-DYNA to Simulation about Tightening Metal Laminated Gasket

Mr. Kobuki, Yohei

Research & Development Center / Quality Analysis Center
YANMAR CO., LTD.

In engine exhaust parts, many metal gaskets are usually used to seal exhaust gas. And recently, the use environment of metal gasket become more severe as combustion pressure and thermal load increase. However, we mainly evaluate gasket by actual machine tests and can not sufficiently evaluate gasket at the design stage. Therefore, we need to evaluate the gasket sealing performance in advance to reduce development time. We created the gasket model that matches the actual gasket bead shape, waviness shape and laminated structure, and calculated gasket tightening process with the dynamic explicit method, using LS-DYNA. In this report, we introduce their application cases of LS-DYNA and the verification results of the simulation by several examinations.

Thursday, 7 November, 2019 15:25-15:55  [ LS-DYNA Users Conference : Manufacturing ]

★Title

Mr. Ichijo, Naoki

Project Manager
MS Body Production Engneering
TOYOTA MOTOR CORPORATION

★Detail

Thursday, 7 November, 2019 15:25-15:55  [ LS-DYNA Users Conference : Convergence Engineering ]

★Title

Mr. Hojo, Masahiro

Propulsion Research Unit, Aeronautical Technology Directorate
Japan Aerospace Exploration Agency

★Detail

Thursday, 7 November, 2019 15:25-16:30  [ Digimat Technical Conference ]

High performance material modeling with Digimat

Mr. Nakayama, Takato

application engineer
C&ES
e-Xstream engineering

Our solution, Digimat is multi-scale material modeling platform and the main target is fiber reinforced plastics. Plastics has some good characteristics such as light-weight, flexibility in the design. On the other hands, the creep deformation, fatigue, temperature dependency have a serious influence on the design. Therefore, analysis considering these properties is necessary for more efficiency design. In this session, I will explain how to create material model for Digimat from experimental data and the required test. Then, I will introduce the advanced material models; creep, fatigue, temperature dependency. Moreover, I will talk about latest features of Digimat.

Thursday, 7 November, 2019 16:00-16:30  [ LS-DYNA Users Conference : New Field ]

Keynote Speech

The operating force analysis of switch mechanism parts for automotive interior

Mr. Sugiyama, Keisuke

INTERIOR/EXTERIOR SYSTEMS DEVELOPMENT DEPT. CAE SECTION
NIHON PLAST CO.,LTD.

Since many strength requirements are required for automotive interior parts, we have been conducting analysis with LS-DYNA through it before, and working to prevent troubles at the initial design stage. Since several years ago, we have been constructing analysis technics for the operating force of switches such as consoles and glove boxes. The operating force of the switch mechanism parts consists of composite elements such as springs, gear dampers, and sliding parts, and it is possible to predict the load at the individual element level, but there are issues with analytic precision and calculation cost at the composite. This time, we studied the analytic precision improvement method for these composite models. We will report our efforts to improve accuracy in this lecture.

Thursday, 7 November, 2019 16:00-16:30  [ LS-DYNA Users Conference : Joint Modeling ]

Simulation of adhesive joints using LS-DYNA

Prof. Sato, Chiaki

Professor
Laboratory for Future Interdisciplinary Research of Science and Technology
Tokyo Institute of Technology

Adhesively bonded joints are recently expanding in use for many applications. In the lecture, methods for designing the joints using LS-DYNA are going to be explained. Several material models dealing with adhesive are implemented in LS-DYNA, and useful analysis can be performed by using the program. In addition to introducing the functions, some tips for using it efficiently are mentioned.

Thursday, 7 November, 2019 16:00-16:30  [ LS-DYNA Users Conference : Manufacturing ]

Approach of the forming analysis in consideration of a bending die

Mr. Taoka, Akira

AISIN SEIKI Co., Ltd

We work on predictive precision improvement of the springback, but assume a die a rigid body and cannot consider the variation in clearance by the die bending until now. On the other hand, the loss reduction by the die trouble is required, and works on structure analysis, the above is a problem in consistency of the structure analysis.
For establishment of the basic technology which was not limited to a product shape, we made an experiment die by taking into account following
- Multiphysics (structure analysis. while forming)
- Expansion of the analysis scale including plates introduce the example estimated as result.

Thursday, 7 November, 2019 16:00-16:30  [ LS-DYNA Users Conference : Convergence Engineering ]

Three-dimensional structural analysis of skin internal elastic fibers

Mr. Tohgasaki, Takeshi

Senior Researcher
Beauty Science Research Center
FANCL Research Institute

The Wrinkles and sagging caused by aging are typical examples of skin problems, and the development of care methods is demanded. Wrinkles and sagging are considered to be changes in the internal structure of the skin. However the details of the morphological changes and the underlying molecular mechanisms are unclear. Recently, the development of bioimaging technology enables three-dimensional (3D) observation with a resolution of several hundred pm. To understand the details of the changes of the skin with aging, we observed the 3D structure of the elastic fibers in the skin by using this technology, and applied the 3D structural analysis software Simpleware to the images. In this presentation, I will report on application examples and problems of structural analysis to the skin based on above the examples, from the perspective of end users.

Thursday, 7 November, 2019 16:35-17:05  [ LS-DYNA Users Conference : New Field ]

A study of Isogeometric analysis in LS-DYNA

Mr. Kikuchi, Toru

Assistant Chief Engineer
Automobile Center
Honda R&D Co.,Ltd.

Isogeometric Analysis (IGA), a new CAE method, has been attracting attention recently as a solution for higher analysis accuracy, faster calculation time, and better CAD compatibility, which are the issues of conventional FEM. These issues are more pronounced in the analysis of parts manufactured by extrusion process. Therefore, we performed large deformation analyses on an assembly model consisting of multiple extruded parts using the IGA features implemented in LS-DYNA. We also examined the influence of changes in material properties due to heat effect around spot welds and partial strain and plate thickness changes due to a part stamping process, which are important for CAE modeling of automobile bodies. In this talk, we will report on an outline of IGA and its advantages and issues based on the knowledge obtained through these analyses.

Thursday, 7 November, 2019 16:35-17:05  [ LS-DYNA Users Conference : Joint Modeling ]

Development of Self-Piercing Riveted Joint Fracture Model

Mr. Nakagami, Masahiro

Assistant Manager
Advanced Vehicle Engineering Development Div.
TOYOTA MOTOR CORPORATION

This paper describes the development of a simplified modeling method to represent fracture of Self-Piercing Riveted (SPR) joints to be used for large scale crash simulation. First, the cross section geometry of the SPR joint was obtained by a 2D simulation of riveting process. Then a detailed 3D SPR model was generated to analyze the fracture mechanism. A simplified SPR model, with shell elements, was developed based on the fracture mechanism. The simplified SPR model well simulated the stress distribution around the joint. The calculated fracture load and fracture mode showed a good correlation with the experimental results.

Thursday, 7 November, 2019 16:35-17:05  [ LS-DYNA Users Conference : Manufacturing ]

Introduction of CAE utilization concepts and application example

Mr. Fukushima, Masahiko

Assistant Manager
Die Engineering Center
DAIHATSU MOTOR CO.,LTD.

★Detail

Thursday, 7 November, 2019 16:35-17:05  [ LS-DYNA Users Conference : Convergence Engineering ]

Overseas case studies, and new ways of automating workflows

Dr. Kerim Genc

Business Development Manager
Synopsys Inc

Synopsys' Simpleware Software converts 3D image data from modalities such as Industrial Computed Tomography (CT) into models for measurement/visualization, 3D Printing, CAD based design and Computational Simulation. Simpleware is well-established among users wanting to generate high-quality image-based models in areas such as the Material Science, Industrial Manufacturing and the Life Sciences. During this presentation, we will give a brief overview of Simpleware, our vision for the future use of image based modeling and how it can be automated to allow further adoption.

Thursday, 7 November, 2019 16:35-17:05  [ Digimat Technical Conference ]

Study on the Mechanical Model of Fiber Reinforced Resin Considering Fiber-Resin Interface Property by Digimat-FE

Mr. Hiramoto, Kenji

Senior Specialist
Technical Research Center
Mazda Motor Corporation

The properties of fiber reinforced composites are affected by many factors such as fiber content, fiber orientation, and fiber-resin interface property. Although the fiber-resin interface property plays a great effect on the mechanical property of the composites, there are very few researches taking into account the fiber-resin interface property in CAE simulation. In this report, injection-molded glass fiber reinforced polypropylene was adopted as a composite material, and the modeling was studied using the fiber geometric property and fiber-resin interface property obtained by the experiment. As a result, it was clarified that the yield behavior of the composite material can be expressed by the fiber-resin interfacial strength.

Thursday, 7 November, 2019 16:40-17:05  [ SIESTA Seminar ]

SIESTA code in SIMUNE's Atomistic Simulation Advanced Platform (ASAP-SIESTA)

Dr. Federico Marchesin

Product Manager
SIMUNE Atomistics

Mr. Daniel Simo

Chief Executive Officer
SIMUNE Atomistics

SIMUNE is expert in ATOMISTIC SIMULATIONS and provides consultancy and computer simulation services to companies developing innovative technology based on the properties of materials at the atomic scale. In 2015, SIMUNE established a strategic partnership with SIESTA for which SIMUNE offers simulation support packages and other related material. SIMUNE will talk about its synergy with SIESTA and the latest developments around the code. SIMUNE will also present its software ASAP (Atomistic Simulation Advanced Platform). ASAP is composed of a set of tools and modules developed around different software packages, including SIESTA, to facilitate and automatize their use

Thursday, 7 November, 2019 17:15-18:20  [ LS-DYNA Users Conference ]

ANSYS Simulation and Strategy

Dr. Larry Williams

Director of Technology
Mechanical, Fluids, and Electronics Business Unit
ANSYS

Imagine if you could experience a newly designed product before building it. That is precisely what over 40,000 ANSYS customers do using advanced physics-based simulation. Engineered products from smart phones to industrial automation to autonomous vehicles are being experienced on the computer.
In this presentation, Dr. Williams will show how great products are designed by engineers using advanced physics-based simulation, and how ANSYS will drive that technology to allow individuals and companies to create remarkable products. He will briefly describe new opportunities and our focus on technology continuity now that LSTC and the LS_DYNA product are part of the ANSYS solution. Industry examples will be highlighted.

Thursday, 7 November, 2019 17:15-18:00  [ LS-DYNA Users Conference : Convergence Engineering ]

★Title

Ms. Miyazaki, Miki

JSOL Corporation

★Detail

Thursday, 7 November, 2019 17:15-18:00  [ Digimat Technical Conference ]

Introduction of case studies using Digimat

Ms. Watanabe, Maiko

JSOL Corporation

Several case studies using Digimat, which was presented at Digimat Users' Meeting 2019, will be introduced.

Friday, 8 November, 2019 10:20-11:20  [ JSTAMP Users Conference ]

Keynote Speech

Material modeling methods for high-precision sheet metal forming simulations

Prof. Kuwabara, Toshihiko

Distinguished Professor
Division of Advanced Mechanical Systems Engineering, Institute of Engineering
Tokyo University of Agriculture and Technology

Improvement of the predictive accuracy for defect formation (such as fracture and springback) using FEA is key to realizing trial-and-error-less manufacturing. In metal forming processes, materials are subjected to various multiaxial stresses and stress reversals. Therefore, the parameters of the material models used in the FE simulations should be determined using the material testing methods that accurately reproduce the stress states generated in real forming processes. This lecture reviews the advanced material testing methods for sheet and tubular metals. Special attention is given to the anisotropic plastic deformation behavior of industrial materials and to the validation of the material models for large plastic strain ranges. Additionally, the effects of the material models on the improvement of the predictive accuracy of forming simulations are discussed.

Friday, 8 November, 2019 10:00-11:20  [ Virfac Technical Conference ]

Technical consultation

★Name

★Division
★Company

★Detail

Friday, 8 November, 2019 10:00-11:20  [ AFDEX Technical Conference ]

Technical consultation

★Name

★Division
★Company

★Detail

Friday, 8 November, 2019 9:30-11:40  [ LS-DYNA Users Conference : IGA Tool ]

IGA Seminar

Mr. Shimizu, Norio

JSOL Corporation

Isogeometric analysis (IGA), where NURBS that CAD utilizes most widely for modeling is used as shape function in Galerkin approximation, is recently gathering attention as one of innovative numerical schemes for next generation. NURBS-based elements have been developed and implemented into LS-DYNA over the last few years. Therefore, it is expected that IGA will be generalized as a powerful tool to integrate the design and simulation process in industry fields near future. In this seminar, we will talk about the summary of IGA, the technology for LS-DYNA IGA and future outlooks with some application examples. We are looking forward to your participation.

Friday, 8 November, 2019 12:30-13:00  [ JSTAMP Users Conference ]

Case studies of the product / technical development using CAE in IRI-Niigata

Mr. Katayama, Satoshi

Senior Researcher
Chuetsu Technical Support Center
Industrial Research Institute of Niigata Prefecture

Industrial Research Institute of Niigata Prefecture(IRI-Niigata) supports the product / technical development of small and medium enterprises(SMEs) with the technology of manufacturing, measurement and material.CAE is also the important technology on the Metal forming that is the prosperous industry in Niigata Prefecture.LS-DYNA is used by many cases of the metal forming because it has a high versatility,it reduced the development time and optimized the tool shapes and the forming processes.I introduce the case studies of the product / technical development using CAE in IRI-Niigata,and describe what is necessary for support of SMEs.

Friday, 8 November, 2019 12:30-13:350  [ Virfac Technical Conference ]

Friction Based Welding of Steel

Prof. Fujii, Hidetoshi

Professor
Joining and Welding Research Institute
Osaka University

Friday, 8 November, 2019 12:30-13:35  [ AFDEX Technical Conference ]

Key points of plate forging

Prof. Wang Zhigang

Faculty of Engineering
Gifu University

Plate forging is a new forming method that combines sheet forming processes with forging processes to obtain the products with a complicated shape and a high precision. In plate forging, the local shape and its precision are generally made up by forging and thus disadvantages of forging operations appear. Tool life, lubrication and internal defects are the key problems just like in cold forging of billets. This talk describes the merits and features of plate forging through some examples.

Friday, 8 November, 2019 13:05-13:35  [ JSTAMP Users Conference ]

Keynote Speech

Utilization of quality enginnering for plastic forming analysis

Mr. Mita, Tomohiko

Production Engineering Department
MITSUBA Corporation

Utilization of analysis in the field of plastic forming is an effective way for reducing design lead time and improving quality. In order to expand the applying range of use of analysis and improve accuracy, new analysis fields and analysis functions are required. LS-DYNA has many analysis fields and analysis functions, thus the analysis conditions are investigated by trial and error. Then, the use of quality engineering is one way to efficiently investigate analysis conditions. The investigation contents of analysis conditions using quality engineering are introduced in this presentation about the theme of fusing processing analysis using multiphysics analysis (structure + heat conduction + electromagnetic field analysis) and forging processing analysis using 3D remeshing function.

Friday, 8 November, 2019 13:40-14:10  [ JSTAMP Users Conference ]

Research and Development for enhancement of the accuracy of springback prediction - Discussion of the effect of deformation history on the unloading behavior -

Mr. Noma, Nobuyasu

Advanced Engineering Developement Center
UNIPRES R&D CO., LTD.

Recently, the strength of the material is tremendously increased. The strength of the steel used for actual vehicle achieved up to 1.3GPa. Due to the application of the high strength steels instead of conventional steels, the difficulty level of the die compensation dramatically went up. To reduce the lead-time for the die manufacturing, the enhancement of the accuracy of CAE is a crucial challenge for all stampers. The essential mechanism of the springback is the elastic deformation driven by the stress at the BDC. Therefore, we precisely measured the unloading behavior of steel sheets subjected to various deformation histories. Incorporating those results into the simulations, we found that the modeling method of the unloading behavior has large impact on the predictive accuracy of springback. In this talk, a portion of some our examples of our R&D will be introduced.

Friday, 8 November, 2019 13:40-14:100  [ Virfac Technical Conference ]

Welding sequence optimization by inherent strain method and recent development for ship building and automotive manufacturing -Line heating and spot welding deformation analysis-

Mr. Tateishi, Junya

JSOL Corporation

Mr. Hiroi, Shinya

JSOL Corporation

We introduce key features and recent development plan of Virfac software. Virfac (VIRtual FACtory) is a simulation software platform for joining and welding. JSOL is developing fast welding deformation analysis software "Virfac welding mega" using inherent strain method. As an example, welding sequence optimization for minimizing deformation will be presented. Also, recent development plan of welding robot combination, line heating for ship building, and spot welding feature will be introduced.

Friday, 8 November, 2019 13:40-14:10  [ AFDEX Technical Conference ]

★Title

★Company

★Detail

Friday, 8 November, 2019 14:40-15:10  [ JSTAMP Users Conference ]

Application example of mold Predictive Deformation support function developed by CADmeister

Mr. Mutou, Takaharu

Product Strategy Division
UEL Corporation

EL sells a Predictive Deformation support module called CADmeister PRESS-FORM-EX.In general, Predictive Deformation is a process in which the user uses his know-how to deform the CAD surface mainly using CAE results and Try-out results.Users requested functional improvements that can make use of their know-how, and the functions have been matured by implementing them.For this reason, the range of use by users has expanded, and it is used not only for inner-panel that are expected to be difficult to predict Deform with press-die, but also for outer-panel that require high-precision surface deformation and mold-die.This year, collaboration with JSOL will be realized, and a part of this function will be implemented in JSTAMP, and the quality of the deformed surfaces using CAE results.This time, with the cooperation of PRESS-FORM-EX users, we will introduce application examples.

Friday, 8 November, 2019 14:40-15:100  [ Virfac Technical Conference ]

★Title

Mr. Nagai, Takuya

Researcher Technical Sec. Technical Research Dept.
SHINKO WELDING SERVICE CO., LTD.

★Detail

Friday, 8 November, 2019 14:40-15:10  [ AFDEX Technical Conference ]

Current hot issues in metal forming simulation - multi-body process simulation and process design and material parameter optimization

Prof. Mansoo Joun

Professor
Mechanical Engineering
Gyeongsang National University (GNU)

The current hot issues including multi-body process simulation and process design optimization are presented with emphasis on their industrial importance. Multi-body process simulation problem involves various plastic deformation induced joining processes for mechanical and autopart assemblies, composite material forming processes and combined assembled die and material deformation analysis problems. In addition, process design and material parameter optimization include not only die shape or process parameters optimization in terms of forming load minimization or quality maximization but also optimal material identification especially of flow stress information, frictional condition and metallurgical material properties. Several practical application examples found from the related indutries are presented.

Friday, 8 November, 2019 15:15-15:45  [ JSTAMP Users Conference ]

Improving accuracy of sheet metal forming with MAT289(Yoshida 6th order model)

Mr. Kato, Naoyuki

Supervisor
Production Engineering Division
YAMAHA MOTOR ENGINEERING CO., LTD.

High accuracy sheet metal forming simulation is important in motor cycle body parts, in order to make the light weight parts by adopting aluminum alloys and hardly shaped parts by aiming high design. Verication examples by MAT289(Yoshida 6th order model) will be intoroduced for various type of sheet in this presentation.

Friday, 8 November, 2019 15:15-15:45  [ Virfac Technical Conference ]

Prior examination for accurate estimation of welding deformation in hull block

Mr. Kizaki, Hironori

STRATEGY GROUP SHIP PROJECT DEPT. TSUNEISHI FACTORY
TSUNEISHI SHIPBUILDING Co., Ltd

At present, most shipyards are building ships using the block method, and so is our company. The accuracy of the hull block affects the final shape of the ship, so we review production methods and work procedures every day. In particular, considering the amount of welding deformation of the hull block prior to construction is considered important for improving quality, reducing costs, and shortening the construction period. The ultimate our goal is to estimate the deformation of complex 3D hull blocks with high accuracy. First, we confirmed and updated the welding deformation database. Next, based on the data, we calculated the welding deformation amount of the sub-assembly and simple structure and compared it with the measured value.

Friday, 8 November, 2019 15:15-15:45  [ AFDEX Technical Conference ]

Introduction of new functions of AFDEX

Mr. Kitao, Toru

JSOL Corporation

Forging simulation software 'AFDEX' is CAE software with user friendly GUI and intelligent meshing.
AFDEX is required not only convenience but also calculations in a short time. Recently, the developer improved/added some functions, and to focus on improvement of the solver. In this talk, we will introduce latest information of the AFDEX V19 to be released in 2019.