Crystal-plasticity finite-element analysis of deformation behavior in a commercially pure titanium sheet

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Hama, T.^1 ; Kobuki, A.^1 ; Fujimoto, H.^1 ; Takuda, H.^1

Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto

606-8501, Japan^1

关键词: Commercially Pure titaniums;    Crystal plasticity analysis;    Crystal plasticity finite element;    Crystal plasticity finite element method;    Deformation behavior;    Deformation mechanism;    Hardening behaviours;    Tension-compression asymmetry;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032071/pdf
DOI  :  10.1088/1742-6596/734/3/032071

来源: IOP

【 摘 要 】

A crystal-plasticity finite-element method was used to examine the deformation mechanism in a commercially pure titanium sheet. The following tension-compression asymmetry was exhibited in the stress-strain curves: the yield stress was larger under tension than under compression, whereas the work-hardening was smaller under tension than under compression. The strain hardening behaviour was predicted qualitatively well using the crystal-plasticity analysis. The simulation results suggested that the tension-compression asymmetry could be explained in terms of the difference in the activity of the twinning systems.