| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Evaluation of isotropic and anisotropic constitutive models on plasticity prediction of AA7075 extruded tube under Tension-Tension and Tension-Compression |
| Author(s) |
Sobhan Alah Nazari Tiji, Amir Asgharzadeh, Taejoon Park, Madhura Athale, Farhang Pourboghrat |
| On-Site Speaker (Planned) |
Sobhan Alah Nazari Tiji |
| Abstract Scope |
Plasticity of AA7075-O extruded tube under tension-tension (T-T) and tension-compression (T-C) was characterized using multiaxial tube expansion test method. Three different yield functions, von-Mises, Hill’s 1948, and Yld2004 were considered to model the anisotropic plasticity of the AA7075-O tubes under T-T and T-C. The anisotropic models were calibrated based on the measured biaxial stresses and the conjugate plastic strain rates as strain-rate potential based on plastic work equivalency. As shown, this calibration method is an accurate and more flexible way of calibrating the advanced yield functions with no necessity for having proportional loading paths. It was also shown that the three yield functions predict the strain paths under T-C conditions almost similarly, however, the strain paths under T-T conditions are predicted better as the number of anisotropy parameters in the yield functions increases. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |