| 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 |
On the Convexity Bound of the Generalized Drucker's Yield Function CB2001 for Orthotropic Sheets |
| Author(s) |
Wei Tong, Seung-Yong Yang |
| On-Site Speaker (Planned) |
Seung-Yong Yang |
| Abstract Scope |
Drucker's sixth-order polynomial yield function for isotropic materials
was generalized in the literature for modeling orthotropic sheet metals via a generalization of the two invariants of the deviatoric stress using the theory of representation. The constant c in the original Drucker's isotropic yield function is found to be bound between -27/8 and 9/4 per the convexity requirement. In many subsequent modeling applications of orthotropic sheets, the same bound is also tactically assumed for the constant c in the generalized Drucker's yield function. In this study,
the validity on assuming such a convexity bound on the adjustable constant c for orthotropic sheets is examined closely. It is
found that a single convexity bound between -27/8 and 9/4 on the constant c does not hold at all for any of those yield functions formulated from the theory of representation approach. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |