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Proceedings Paper

Simplified identification of material parameters for Yoshida-Uemori kinematic hardening model
Author(s): T. Phongsai; V. Uthaisangsuk; B. Chongthairungruang; S. Suranuntchai; S. Jirathearanat
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Paper Abstract

In sheet metal forming process of Advanced High Strength (AHS) steels, springback effect is one of the most critical problems for manufacturer. The springback of a formed part occurs due to residual stress released after deformation. FE simulations were often used to describe both forming and springback behavior of steel sheets. Recently, the Yoshida- Uemori (Y-U) kinematic hardening model has been successfully applied for the springback simulation. The model is capable of reproducing the transient Bauschinger effect, permanent softening and work hardening stagnation during a large deformation. In this work, method for determining materials parameter of the Y-U model was briefly presented. Initially, cyclic tests were performed under both tension and compression loads for the high strength steel grade JSC780Y and JSC980Y. FE simulations of 1-element model were carried in order to investigate predicted cyclic stress strain curves. Both Y-U model and a mixed isotropic-kinematic Barlat2000 model were used in the simulations. Stamping tests of hat shape sample were carried out for verifying the experimental and numerical results. It was found that the Y-U model provided more accurate springback results than the other model.

Paper Details

Date Published: 2 June 2014
PDF: 12 pages
Proc. SPIE 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics, 92340A (2 June 2014); doi: 10.1117/12.2054308
Show Author Affiliations
T. Phongsai, King Mongkut’s Univ. of Technology Thonburi (Thailand)
V. Uthaisangsuk, King Mongkut’s Univ. of Technology Thonburi (Thailand)
B. Chongthairungruang, King Mongkut’s Univ. of Technology Thonburi (Thailand)
S. Suranuntchai, King Mongkut’s Univ. of Technology Thonburi (Thailand)
S. Jirathearanat, National Metal and Materials Technology Ctr. (Thailand)


Published in SPIE Proceedings Vol. 9234:
International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics
Somnuk Sirisoonthorn, Editor(s)

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