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Title: Springback Simulation of High Strength Steel Sheet using Local Interpolation for Tool Surfaces

Abstract

This paper presents the effect of tool modelling accuracy on the simulation accuracy of springback in high strength steels. Simulations of a two-dimensional draw-bending process are carried out by using a polyhedral tool model whose surface is approximated by a polyhedron, and a model whose surface is smoothed by quadratic parametric surfaces proposed by Nagata [Nagata, Comput. Aided Geom. D, 22(2005), 55-59] (Nagata patch model). It is found that not only the shape accuracy but also the normal vector accuracy of tool models are of importance for accurate springback predictions. The use of the Nagata patch model is an efficient approach not only to improve the simulation accuracy but also to make the simulation be hardly influenced by the tool mesh, even for simulations of a high strength steel in which large amount of springback is involved.

Authors:
; ;  [1];  [2];  [3];  [2]
  1. Department of Energy Science and Technology, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501 (Japan)
  2. Volume-CAD System Research Program, The Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako-shi, Saitama 351-0198 (Japan)
  3. (France)
Publication Date:
OSTI Identifier:
21061760
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 908; Journal Issue: 1; Conference: NUMIFORM 2007: 9. international conference on numerical methods in industrial forming processes, Porto (Portugal), 17-21 Jun 2007; Other Information: DOI: 10.1063/1.2740909; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; BENDING; COMPUTERIZED SIMULATION; INTERPOLATION; MATHEMATICAL MODELS; SHAPE; SHEETS; STEELS; SURFACES; TOOLS; ULTIMATE STRENGTH

Citation Formats

Hama, Takayuki, Fujimoto, Hitoshi, Takuda, Hirohiko, Teodosiu, Cristian, LPMTM-CNRS, University Paris 13, 93430 Villetaneuse, and Makinouchi, Akitake. Springback Simulation of High Strength Steel Sheet using Local Interpolation for Tool Surfaces. United States: N. p., 2007. Web. doi:10.1063/1.2740909.
Hama, Takayuki, Fujimoto, Hitoshi, Takuda, Hirohiko, Teodosiu, Cristian, LPMTM-CNRS, University Paris 13, 93430 Villetaneuse, & Makinouchi, Akitake. Springback Simulation of High Strength Steel Sheet using Local Interpolation for Tool Surfaces. United States. doi:10.1063/1.2740909.
Hama, Takayuki, Fujimoto, Hitoshi, Takuda, Hirohiko, Teodosiu, Cristian, LPMTM-CNRS, University Paris 13, 93430 Villetaneuse, and Makinouchi, Akitake. Thu . "Springback Simulation of High Strength Steel Sheet using Local Interpolation for Tool Surfaces". United States. doi:10.1063/1.2740909.
@article{osti_21061760,
title = {Springback Simulation of High Strength Steel Sheet using Local Interpolation for Tool Surfaces},
author = {Hama, Takayuki and Fujimoto, Hitoshi and Takuda, Hirohiko and Teodosiu, Cristian and LPMTM-CNRS, University Paris 13, 93430 Villetaneuse and Makinouchi, Akitake},
abstractNote = {This paper presents the effect of tool modelling accuracy on the simulation accuracy of springback in high strength steels. Simulations of a two-dimensional draw-bending process are carried out by using a polyhedral tool model whose surface is approximated by a polyhedron, and a model whose surface is smoothed by quadratic parametric surfaces proposed by Nagata [Nagata, Comput. Aided Geom. D, 22(2005), 55-59] (Nagata patch model). It is found that not only the shape accuracy but also the normal vector accuracy of tool models are of importance for accurate springback predictions. The use of the Nagata patch model is an efficient approach not only to improve the simulation accuracy but also to make the simulation be hardly influenced by the tool mesh, even for simulations of a high strength steel in which large amount of springback is involved.},
doi = {10.1063/1.2740909},
journal = {AIP Conference Proceedings},
number = 1,
volume = 908,
place = {United States},
year = {Thu May 17 00:00:00 EDT 2007},
month = {Thu May 17 00:00:00 EDT 2007}
}