Japanese

Poster

Progress on speedup of tool cooling simulation for hot forming technique

Progress on speedup of tool cooling simulation for hot forming technique

The hot press technique is known as a technique that can produce and form high-strength steel panel. JSOL has been working on this issue to develop a manufacturing CAE solution to the technique. Some new speed up items to the tool cooling simulation within fluid dynamics function called ICFD in LS-DYNA will be presented. Not only ICFD itself but also fluid-structure interaction feature have been upgraded by recent development in LS-DYNA and application to simulation of multiphysics phenomena in industry is now becoming more and more realizable. General information needed to estimate realiability of fluid-structure interaction simulation within LS-DYNA will be also provided.

Mechanical joining simulation with LS-DYNA

Mechanical joining simulation with LS-DYNA

Multi-material joining technology which joins the different materials each other is very important for the body weight reduction that it contribute greatly for improve of fuel consumption. One of them includes the mechanical joining. JSOL obtained fastening strength test data by multi-material joining with high tensile strength steel and aluminum which was mainly for Self Piercing Rivet (SPR) and Flow Drill Screw (FDS) last year. In this poster, we will introduce the current status of mechanical joining simulation with LS-DYNA by comparing with the test data.

Simulation of a Li-ion battery crash abuse case

Simulation of a Li-ion battery crash abuse case

The use of Li-ion battery cells for Electric Vehicle is rapidly expanding due to its light-weight and high-efficiency. However, batteries can lead fires when short circuit occurs and some critical incidents are already reported. Recently, simple Randle model is implemented to LS-DYNA, which makes it possible to simulate the battery abuse case during the vehicle crash. This presentation will introduce the overview of the modeling and how-tos to use these features.

Introduction of material model for JSTAMP

Introduction of material model for JSTAMP

For the weight reduction, application of Aluminum alloys and high strength steels are increasing. The material model which describes deformation of the materials is an important factor for accurate sheet metal forming simulation of the difficult-to-process materials. Elastic-plastic material model is composed of a yield function and a hardening rule. The yield function identifies the yield condition and describes the anisotropy. The hardening rule describes its work hardening. These components have various kinds of formulations and have been studied by many researchers. LS-DYNA is implemented many kinds of elastic-plastic material models and some of these are available on JSTAMP. In this poster, simulation results which are depending on the difference of the yield functions are discussed.

2016 latest function related with frequency response analysis

2016 latest function related with frequency response analysis

Nowadays, many companies have been using frequency domain function with LS-DYNA and some new features have been implemented. We will introduce latest work with frequency domain. The contents are as below.

  • -Equivalent Radiated Power
  • -additional fatigue analysis function
  • -Multidisciplinary Optimization sample with frequency domain analysis
  • -newly developed damping setting
Introduction of LS-OPT and LS-TaSC

Introduction of LS-OPT and LS-TaSC

LS-OPT and LS-TaSC are the optimization tools that have a high affinity for LS-DYNA, both developed by LSTC. The growing use of these tools proves the increasing demand for the optimal design with the help of CAE simulation. This poster will introduce the usage examples for these tools: the material parameter identification by using LS-OPT and the lightweight structure design by using LS-TaSC.

Introduction to element technology in LS-DYNA

Introduction to element technology in LS-DYNA

The choice of the element type is the key to obtain a reasonable result from the simulation. In current LS-DYNA, many general shell and solid element is implemented. Also, LS-DYNA recently has expanded its range of application by implementing various new element formulations including mesh free method, high-order elements and IGA. This allows users employ elements suitable for each simulation, however, they need to select the element formulation appropriately depending on the target problem. This poster describes summary and characteristics of different elements available in LS-DYNA to perform simulations with well-chosen elements, along with the typical problems arise from wrongly-chosen elements and remedies for the problems.

Resitance Spot Welding simulation of LS-DYNA

Resitance Spot Welding simulation of LS-DYNA

Resistance spot welding (RSW) is superior connecting methods about cost and work time compared to other methods, and applied to many products. Since LS-DYNA is implemented electromagnetic (EM) solver from R7, resistive heating analysis is available. In this poster, we introduce the nugget generation simulation using EM solver and cooling simulation considering a phase transformation.

Selection and setting of fluid analysis of LS-DYNA

Selection and setting of fluid analysis of LS-DYNA

The fluid-structure coupling analysis using ALE or SPH method has always been implemented to LS-DYNA. Recently, Incompressible Fluid Dynamics (ICFD) analysis and Discrete Element Method (DEM) have been introduced and the application range of the fluid-structure coupled analysis has been expanded. The increased options for the fluid analysis methods make it difficult to choose the right and the most appropriate method for the phenomena to simulate and for the evaluation and purposes for that simulation. In this poster, we will take some typical phenomena as examples and introduce the know-how for selecting the appropriate analysis method and defining the input. The comparison between the simulation results of each method will also be presented for reference.

Methods of how to model failure and crack propagation in LS-DYNA

Methods of how to model failure and crack propagation in LS-DYNA

The easiest way to create the new surface caused by material failure is element deletion, which has been applied in order to model the changes of the characteristics and the loading path of the structure. Recently, several methods which can accurately predict the propagation have been proposed. While these methods such as XFEM, SPG, Peridynamics have also been implemented in LS-DYNA, it is important for users to understand which method is appropriate and should be selected, depending on the material and the shape of the structure. In this poster, we will introduce the new feature in LS-DYNA and the application for the failure propagation.

Modeling of Adhesive behavior in LS-DYNA

Modeling of Adhesive behavior in LS-DYNA

In recent years, new materials, such as aluminum and plastics, have increasingly applied to vehicle body structure in order to meet light weight design instead of iron. To bond these different materials, use of adhesives also has increased. In this session, we will introduce the outline of adhesive erosion using material and contact modeling with examples.

Automotive EMC and Antenna Design by EMC Studio,  An Electromagnetic Simulation Tool

Automotive EMC and Antenna Design by EMC Studio, An Electromagnetic Simulation Tool

Number of electric/electronic components in the vehicle is dramatically increasing these years. And potential risk of electromagnetic interference between systems (EMC problem) is getting higher and higher. In this poster session, we will present practical application examples about automotive EMC design by electromagnetic simulation tool EMC Studio. Also, study of human body exposure to low frequency electromagnetic field (ICNIRP compliance check) will be also presented.

Robust design approach with DIFFCRASH

Robust design approach with DIFFCRASH

In recent years, light weight design has been required especially in automotive industry in order to meet strict safety and fuel emission standards as well as other features such as riding comfort and maneuverability. In order to achieve it, importance of robust design which minimizes the influence from scatters from production phase and operation condition is increasing. DIFFCRASH, developed by SIDACT GmbH in Germany, is a software which visualizes triggers of scatter in physical behaviors by statistical analysis of multiple animation files from LS-DYNA. In this session, functionalities of DIFFCRASH for robustness analysis are introduced with examples.

Analytical solution of composite material

Analytical solution of composite material

JSOL is promoting the development of analytical techniques in the field of fiber reinforced plastics. In this poster, we will introduce the portfolio for composite simulation and a part of analysis technology developed so far, especially analysis examples using LS-DYNA.

LS-DYNA & JSTAMP Forum 2017
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