LS-DYNA & JSTAMP Forum 2017

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Welcome to the LS-DYNA & JSTAMP Forum 2017

JSOL Corporation holds an annual LS-DYNA & JSTAMP Forum to provide our users a wide range of information including the latest simulation technologies and case studies and also to offer the opportunity for information exchange among our users.

This year the venue of the LS-DYNA & JSTAMP Forum 2017 moves from Nagoya to Tokyo. It will be held at Tokyo Conference Center Shinagawa, from Tuesday 31 October to Wednesday 1 November 2017. Our engineers will showcase the latest simulation technologies and poster sessions will be held. We welcome any inquiry, consultation and discussion about your day-to-day work.

We encourage our users to take advantage of this once a year opportunity. We look forward to your attendance in the event.

JSOL Corporation
Engineering Technology Division

General Session

Overview

Title:
LS-DYNA & JSTAMP Forum 2017
Dates:
Tuesday 31 October to Wednesday 1 November 2017.
Organizer:
JSOL Corporation
Venue:
Tokyo Conference Center Shinagawa
1-9-36 Konan Minato-ku Tokyo Japan  map
Expected number of participants:
400
Register:
Pre-registration required.

Contact

LS-DYNA & JSTAMP Forum Secretariat
JSOL Corporation, Engineering Technology Division

E-mail : event@sci.jsol.co.jp

Prediction for Local Deformation Modes of Structural Members Using the Isogeometric Analysis and Fast Nurbs Generator

Mr. Kenji Takada
Chief Engineer,
Department 2, Technology Development Division 9,
Automobile R&D Center,
Honda R&D Co.,Ltd.

The current shell elements of FEM use bilinear shape functions which are difficult to predict a complicated local deformation with high accuracy. To resolve this problem, IsoGeometric analysis considered. First, to investigate the applicability of IsoGeometric analysis in crashworthiness, simplified models were utilized. They contain S-frame model for collapse problem, 3-point bending model for fracture, L-T model for spot weld failure and hat-section model for axial crash problem. These simulation results based on the IsoGeometric analysis correlated well with the experimental tests. Next, a fast Nurbs Generator to comprehensively transfer the data between CAD and IsoGeometric analysis was developed by the authors. In this presentation we will address the following three points: evaluation of the IsoGeometric analysis results against the experimental results, functionalities of Fast Nurbs Generator and its algorism, and the future challenges of IsoGeometric analysis.

Springback Prediction with Modified Yoshida-Uemori Model that Accounts for Transformation Induced Plasticity (TRIP)

Associate Prof. Fadi Abu-Farha
Automotive Engineering,
Clemson University - International Center for Automotive Research

Transformation-induced plasticity (TRIP) steels possess improved strain hardening behavior and resistance to necking that are favorable for automotive body applications. However, the TRIP effect causes complex springback behavior of these steels that can hardly be predicted by existing constitutive models. In this work, the Yoshida-Uemori model describing isotropic and kinematic hardening is modified by adding new parameters that represent austenite-to-martensite transformation in TRIP steel. Cyclic tension/compression experiments were performed on a selected TRIP-steel grade, and the results were used to calibrate the modified model. The modified model was coded via user subroutine into a commercial FE solver. The springback predictions were compared with actual try-out stamping experimental results for highlighting the improvement of predictions with the modified model.

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