2 June 2014 Simplified identification of material parameters for Yoshida-Uemori kinematic hardening model
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Proceedings Volume 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics; 92340A (2014) https://doi.org/10.1117/12.2054308
Event: International Conference on Experimental Mechanics 2013 and the Twelfth Asian Conference on Experimental Mechanics, 2013, Bangkok, Thailand
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.
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T. Phongsai, T. Phongsai, V. Uthaisangsuk, V. Uthaisangsuk, B. Chongthairungruang, B. Chongthairungruang, S. Suranuntchai, S. Suranuntchai, S. Jirathearanat, S. Jirathearanat, } "Simplified identification of material parameters for Yoshida-Uemori kinematic hardening model", 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; https://doi.org/10.1117/12.2054308
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