On the modelling of strength differential and anisotropy exhibited by titanium

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

Manopulo, Niko^1 ; Raemy, Christian^1 ; Hora, Pavel^1

ETH Zurich, Institute of Virtual Manufacturing, Tannenstrasse 3, Zurich

8092, Switzerland^1

关键词: Anisotropic hardenings;    Drawn cups;    Loading condition;    Strong anisotropy;    Tension-compression asymmetry;    Titanium materials;    Yield function;    Yield surface evolutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032051/pdf
DOI  :  10.1088/1742-6596/734/3/032051

来源: IOP

【 摘 要 】

Modelling the response of titanium alloys under plastic deformation is challenging. In addition to strong anisotropy, these materials exhibit tension-compression asymmetry as well as anisotropic hardening even under monotonous loading conditions. The present contribution aims to propose a new modelling approach for titanium materials, by a homogeneous introduction of asymmetry into existing symmetric yield functions. Furthermore, anisotropic hardening effects are tracked describing the strain dependant yield surface evolution. The results are validated using the earing profile of deep drawn cups.