| 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 |
Recent Advances on Modeling Plastic Deformation of Textured Metals with Applications to Metal Forming |
| Author(s) |
Oana Cazacu |
| On-Site Speaker (Planned) |
Oana Cazacu |
| Abstract Scope |
An accurate description of the yield surface defining the onset of plastic deformation is essential for high-fidelity numerical predictions of forming processes. Due to the ease in calibration from simple tests, generally von Mises isotropic criterion and Hill orthotropic criterion are used in industry. While more advanced 3-D yield criteria have been developed, generally such criteria are written in terms of eigenvalues of transformed stress tensors and as such the anisotropy coefficients are not directly expressible in terms of mechanical properties.
Using general representation theorems, generalizations of the isotropic invariants J2 and J3 such as to account for plastic anisotropy have been developed. Using these anisotropic invariants, the anisotropic form of any isotropic yield function can be obtained simply by replacing J2 and J3 with their respective anisotropic generalizations. This framework ensures that the minimum number of anisotropy coefficients is specified.
Illustrative examples of full three-dimensional yield criteria expressed in terms of generalized invariants and their application to the prediction of formability of single crystals and polycrystalline FCC, BCC and HCP materials are presented. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |