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: Simultaneous interpretation
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Wednesday, 31 October, 10:15-11:15 [General Session]
Mr. Yasuo Yamamae
Group Manager
Safety CAE Technology Development Dept. Advanced CAE Div.
TOYOTA MOTOR CORPORATION
Reduced model for predicting injury values of Hybrid III dummy in sled of frontal collision was established by machine learning from FE simulation results. Prediction error of injury values was within approximately 10% of FE simulation results. Reduced model for predicting displacements of front side rail in full car of frontal collision simulation was also established by machine learning. FE results were clustered by deformation modes of front side rail and reduced models were established in each mode. Accuracy of reconstructed displacements of reduced models was better than without clustering.
Wednesday, 31 October, 11:15-12:15 [General Session]
Dr. Brian Wainscott
Livermore Software Technology Corporation
TBA
Wednesday, 31 October, 13:30-14:00 [Multiphysics]
Dr. Michael May
Head of Department Materials and Simulation Methods Head of Business Unit Aviation
Materials and Simulation Methods
Fraunhofer EMI
In the development process of Aerospace industry, a key requirement to obtain a permission to flight is the proof, that a novel rotorcraft is designed to assure capability of continued safe flight and landing after impact with a 1 kg bird. It is accepted by the federal authorities that proof of compliance with this regulation can be shown by numerical analysis.
Within the framework of the European research programme Clea Sky 2, Airbus Helicopters is developing a high-speed rotorcraft demonstrator RACER (Rapid and Cost-Effective Rotorcraft). This rotorcraft is capable of flying about 50% faster than conventional rotorcraft.
In this presentation, we will discuss our modeling strategy for bird strike analyses on RACER. The bird was modeled using SPH, the rotorcraft was modeled using Lagrangian finite elements. A range of material models was employed to capture the material response of the relevant composite materials, adhesives, metals and polymers.
Our analyses indicated that the novel rotorcraft is bird strike proof and therefore fulfills these requirements of the certification authorities.
Wednesday, 31 October, 14:05-14:35 [Multiphysics]
Associate Prof. Kuniharu Ushijima
Department of Mechanical Engineering, Faculty of Engineering
Tokyo University of Science
MFP uses powder (toner) in the process of drawing letters and pictures. In the product development, grasping the behavior of powder is very important in order to evaluate whether the required function is sufficiently satisfied.
Wednesday, 31 October, 14:40-15:10 [Multiphysics]
Mr. Hiroaki Takada
CAE Development Division R&D Headquarters Business Technologies
KONICA MINOLTA,INC.
In product development of Multifunction Peripheral (MFP), we use LS-DYNA for drop analysis of casing, transport analysis of paper and belt, and powder behavior analysis.
Wednesday, 31 October, 13:30-14:00 [Material Modeling]
Mr. Kunio Takekoshi
Manager
Engineering Division
Terrabyte Co., Ltd.
Stress-strain curve (SS curve) for some polymer materials are characterized by softening behavior accompanied with necking deformation and re-hardening behavior before rupture. Since non-uniform deformation of specimen is observed with the behaviors mentioned above, it is challenging to identify material input parameters for non-linear finite element method solver from experimental results. Although employing an optimization tool is effective for the identification of material parameters, it is necessary to approximate SS curve into an appropriate certain function with design variables. However there might not be any functions which can show both of the softening and re-hardening behaviors. This study tries to approximate SS curve of some polymer materials into several Bezier curves for an optimization tool. Choice of design variables and its ranges are studied and will be given in this presentation.
Wednesday, 31 October, 14:05-14:35 [Material Modeling]
Dr. Nao Sugimoto
Assistant Chief Engineer
Department 4, Technology Research Division 9, Automobile R&D Center
Honda R&D Co., Ltd.
High strength aluminum(AL) alloys (6xxx series, 7xxx series) are being studied for body parts in order to enhance automobile fuel efficiency, vehicle dynamics and collision safety of automobiles. but in that case, prediction of material fracture is a key factor.
In this report, fracture behavior of high strength AL alloy extruded material was determined and fracture behavior was modeled on FEM by Cockcroft - Latham ductile fracture model. Further, in the AL extruded material, the crystal grains of the surface layer were coarsened by the extrusion process, and the surface layer of the extruded material was slightly changed in hardness. In order to reflect its contents, the laminate material definition was additionally defined in the ductile fracture model in the FEM model. As a result, it was possible to predict both tensile fracture and local bending fracture more accurately.
Wednesday, 31 October, 14:40-15:10 [Material Modeling]
Dr. Manoj Madurapperuma
Engineering Division
Terrabyte Co., Ltd.
Impact of tsunami driftwood on reinforced concrete structures is studied by using detailed FE models. First, characteristics of the impact force due to driftwood are investigated using impact on a rigid wall. Then impact force and damage behavior of the RC wall are investigated.
Wednesday, 31 October, 13:30-14:00 [Manufacturing 1]
Mr. Satoru Kawafune
Assistant Coordinator
Stamping & Plastics Production Engineering Dept. Vehicle Production Engineering Div.
DAIHATSU MOTOR CO.,LTD.
TBA
Wednesday, 31 October, 14:05-14:35 [Manufacturing 1]
Mr. Hideaki Fukumasu
Manager
Products Research & Development Dept.
Mitsubishi Aluminum Co., Ltd.
Uniaxial and biaxial tests were carried out for AA3104 aluminum alloy sheets to determine the anisotropic coefficients α1-α8 and exponent M of the Yld2000-2d yield function. In addition, uniaxial tensile and rolling tensile tests were carried out to identify parameters for various hardening functions. FE simulations of cup drawing were carried out using the determined parameters for the Yld2000-2d yield function and hardening functions. By comparing the simulation results with the results of experimental cup drawing tests, the effects of material modeling on the accuracy of earing prediction were investigated.
Wednesday, 31 October, 14:40-15:10 [Manufacturing 1]
Mr. Shinichirou Shimokawa
Assistant manager
Technology Development Department Development Department
MATSUO INDUSTRIES
However, if the powder is directly modeled, the analysis scale will be significantly large. This results in long calculation time.To solve this problem, we use the SPH method as fluid approximate. In this presentation, we introduce analysis case using this technique.
Wednesday, 31 October, 13:30-14:00 [THUMS]
Dr. Masami Iwamoto
Program Manager
Human Science Research-Domain, Cranial Nervous System Modeling Program
Toyota Central R&D Labs., Inc.
The presentation includes overview of new release models of the human body model THUMS that can simulate human body injuries in crash situations on the computers. The new release models include a new muscle controller that can control occupant body postures as well as forces on a pedal and so on, Version 6 that was developed by incorporating the new muscle controller into Version 4 that can predict internal organ injuries, Version 4 pedestrian model series for EuroNCAP TB024 (Pedestrian Human Body Model Certification).
Wednesday, 31 October, 14:40-15:10 [THUMS]
Ms. Sumie Kinouchi
JSOL Corporation
The development of THUMS was started in 1997, and Version 5 was released as the latest version. This lecture will introduce the differences among versions and adjunct data. Tools related to THUMS, such as THUMS positioning tool in J-SEATdesigner that enables to set up positioning simulation with THUMS will be introduced as well.
Wednesday, 31 October, 15:40-16:10 [Automotive]
Mr. Kazunori Maehara
Assistant Chief Engineer
Department 2, Technology Development Division 12, Automobile R&D Center
Honda R&D Co., Ltd.
To investigate the biofidelity of the thorax response of the next-generation frontal crash test dummy THOR, a series of thorax compression CAE analysis from various locations and directions was performed in comparison with Hybrid III and HONDA elderly human body model.
As a result, although the chest response of THOR was closer to human body than that of Hybrid III, especially around clavicle area , it was found that the response discrepancy in oblique direction in which rib fractures occur frequently becomes large.
Wednesday, 31 October, 16:15-16:45 [Automotive]
Mr. Peter Reithofer
General management
4a engineering GmbH, Austria
In recent years the demand on safety relevant plastic parts in the automotive industry has led to a strong interest for a more detailed description of the behavior of thermoplastic materials and thus more complex material cards.
Was it first the interest on the deformation behavior of plastics under different loading conditions (tension, shear, compression・*MAT_SAMP-1), nowadays the failure of this material group is of researching interest.
In the past decade 4a has developed methods, processes and algorithms to characterize different materials by an efficient way (IMPETUS™ dynamic testing device) and to carryout validated material cards for LS-DYNA® in predefined processes (software solution VALIMA™). In the contribution we would like to introduce these systems.
Wednesday, 31 October, 16:50-17:20 [Automotive]
Mr. Kazuhiro Kaneda
Department 4,Technology Development Division 9, Automobile R&D Center
Honda R&D Co., Ltd.
Recently, the application of plastic materials for vehicle parts has been increased in terms of light-weighting by taking advantage of low specific gravity and design by taking advantage of degree of freedom in parts shape. Also, it has become necessary to improve the accuracy of crash analysis in the automotive development as a result of raising the safety consciousness around the world. Since the plastic parts have a great effect on crash analysis in low speed region especially, it is essential to improve the accuracy of the "Material Card" that uses in the crash analysis of plastic parts for improvement of prediction accuracy. In this presentation, the characteristic identification method of plastic materials for crash analysis with 3 points bending typed machine will be proposed, and the study results will be reported.
Wednesday, 31 October, 15:40-16:10 [New Field]
Mr. Akitoshi Nishimura
CEO
Mainmark Structural Consulting Co., Ltd.
TBA
Wednesday, 31 October, 16:15-16:45 [New Field]
Associate Prof. Kazunori Shinohara
Department of Mechanical Systems Engineering
Daido University
To construct an automation system for tie-dyeing techniques, a tie-dyeing robot using Japanese traditional Arimatsu-Narumi tie-dyeing techniques was developed. The first problem to overcome was the breaking of fabric. In case of tie-dying with robots, when using a cylindrical needle, the fabric has to be pushed into the hollow cylindrical cap, after it has been set on it. When this happens, friction forces occur among the fabric, the needle and the cap. The friction forces cause tensile stress inside the fabric locally and transiently. The second problem to overcome was the tie-dyeing pattern. In this study, to clarify fabric mechanisms and how fabric behavior affects load factors, we analyzed fabrics using LS-DYNA.
Wednesday, 31 October, 16:50-17:20 [New Field]
Mr. Kazushi Sasaya
Technical Consultant
Marketing
Elysium Co. Ltd.
To utilize Isogeometric Analysis, we have problems to prepare the IGA model from CAD data. I will show you the IGA tool by demonstration that make it possible easier than used to.
Wednesday, 31 October, 15:40-16:10 [Manufacturing 2]
Mr. Masato Sakai
ASSISTANT MANAGER
PRODUCT ENGINEERING DEVELOPMENT DIV.
FUTABA INDUSTRIAL CO.,LTD.
Although the strength of automotive parts has been increasing in order to improve fuel economy and safety, as the strength of the material increases, the springback after pressing increases, making it difficult to predict by simulation.
One of the reasons that the try-panel and the simulation result do not match is "deflection of the mold", but the higher the strength of the material, the more the effect of the mold deflection on the deterioration of the coincidence ratio of the simulation seems to increase .
In this lecture we will report how the degree of agreement between the trie panel and the simulation result changed by measuring the dynamic deflection of the mold and feeding it back to the simulation.
Wednesday, 31 October, 16:15-16:45 [Manufacturing 2]
Dr. Nobuyasu Noma
Advanced Engineering Development Center, Analysis Group
UNIPRES R&D CO., LTD.
For high-accurate springback prediction, proper evaluation of compressive stress is important because bending contains a compressive stress state. In general, metal material shows the SD (Strength Differential) effect, which is a difference in tensile and compressive stresses. However no material models which can reproduce the SD effect are implemented into commercial FEM code. In this study, the SD effect of DP980MPa steel sheet was measured and high-accurate material model was established. Furthermore this model was implemented into JSTAMP using user-subroutine functions. To validate this model, press forming experiments were carried out. Comparing those results, we can conclude that the accuracy of springback prediction is dramatically improved by considering the SD effect.
Wednesday, 31 October, 16:50-17:20 [Manufacturing 2]
Mr. Mitsuhiro Nakamasu
Assistant Manager
Development Department
SANKO CO.,LTD.
The press forming simulation system is very useful in press forming die manufacturing. But if you once get the simulation software, would it work equally for anyone? In order to obtain greater effect, we should operate it according to the respective actual situation. (Probably, every company inevitably does so.)
Our company, Sanko Co., Ltd. manufacture press forming dies more than 500 annually, and produce various products with these dies. In this presentation, I would like to introduce situation of JSTAMP usage at our company with actual examples. It would be my pleasure if it could provide a topic as an example of how to actually make profits at the press forming die factory.
Wednesday, 31 October, 15:40-16:10 [Convergence Engineering]
Ms. Mai Nonogawa
Lead Researcher
Institute of Sport Science
ASICS Corporation
In designing process of running shoes, multiple requirement functions such as stability, cushioning and so on must be simultaneously satisfied. For example, it has been known that the long term running with poor stability shoes causes various foot injuries. Therefore the shoe stability, which means the control of excessive foot joint motions, is essential. In this study, stability prediction method for running shoe is proposed by using computer simulation. First, the numerical foot and ankle model with bone, cartilage, soft tissue, plantar fascia and ligaments was constructed using Simpleware software based on the X-ray CT images of the foot measured in the supine position. Next, by comparing calculated foot deformation with experimental data, the validity of the model has been confirmed. It shows that this model is so powerful tool in the practical running shoe designing.
Wednesday, 31 October, 16:15-16:45 [Convergence Engineering]
Associate Prof. Mukunoki Toshifumi
Faculty of Advanced Science and Technology
Kumamoto University
Due to developing X-ray CT scanner, pore structure of soil has been Visualized in recent. Moreover, advanced image analysis techniques can give quantitative evaluation to pore structure of sandy soil. These developments will make us deeply understand mechanical property of sandy soil and fluid mechanics in pore and then, it is expected that micro mechanics will achieve new development. In this presentation, 3-D sphere element filling method so called 3-D granulometric method (3DGM) and combine results obtained from 3DGM and peroration concept so called voxel peroration method (VPM) developed in my laboratory will be introduced. Then, I will present some application examples to water retentivity of granular materials such as sandy soil.
Wednesday, 31 October, 16:50-17:20 [Convergence Engineering]
Mr. Masahito Natsuhara
General Manager
Analytical & Measuring Instruments Division Non-Destructive Inspection Business Unit
Shimadzu Corporation
There is a nondestructive testing method to inspect the internal state of the product.
We introduce the technology to display the internal structure in 3D. We have used a wide range of people from development, production and quality assurance of automobile parts and electric appliances. Commentary from history and foundation to the latest CT model information.
Wednesday, 31 October, [Lunch Session]
Mr. Motoki Kobayashi
Manager
CAE
HUMANETICS INNOVATIVE SOLUTIONS JAPAN INC.
Humanetics offers verification experiments and analysis solutions to variety parts and assembly, also the most up-to-date versions of dummy models. During this speech, we will introduce you the latest development circumstances of analytical model- especially focusing our topic on the great variety of new NCAP assessment models for 2020.
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