| 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 |
An Application of Homogeneous Anisotropic Hardening Model to the Prestrained Hole-expansion Experiment |
| Author(s) |
Jinjin Ha, Yannis P. Korkolis |
| On-Site Speaker (Planned) |
Jinjin Ha |
| Abstract Scope |
In this work, the plastic anisotropy of AA6022-T4 in hole-expansion is investigated focusing on prestraining effect, and its numerical solution is predicted by Homogeneous Anisotropic Hardening (HAH) model combined with an anisotropic yield function. For the prestraining, the material is subjected to 8 % of uniaxial tension in the RD in advance. Then, hole-expansion is conducted in a fully-instrumented hydraulic press with a flat-headed punch. In both experiments, digital image correlation (DIC) is used, to confirm the prevalence of uniaxial loading in the prestraining step and to measure thickness strain in the hole-expansion. The results show that the plastic anisotropy is manifested as a non-axisymmetric strain distribution around the hole. The prestraining, leading to non-proportional loading, changes the location of failure from ~45o to RD. The simulation shows the current version of HAH model is limited in capturing the thickness contours and the failure location. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |