About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithms Development in Materials Science and Engineering
|
Presentation Title |
Non-Schmid Continuum Slip Crystal Plasticity with Implications for Dissipation Rate |
Author(s) |
Ankit Srivastava, Alan Needleman |
On-Site Speaker (Planned) |
Ankit Srivastava |
Abstract Scope |
Schmid’s law states that the slip rate on a slip system is governed by the resolved shear stress on that system. However, under many circumstances, stresses other than the Schmid resolved shear stress can play a significant role. Herein, we analyze nonuniform plane strain tensile deformation of single crystals with an elastic-viscoplastic continuum slip crystal constitutive relation and with the driving force for slip including a non-Schmid stress. One consequence of including non-Schmid stress can be a change in the slip mode. Another consequence is that with the inclusion of non-Schmid stresses in the plastic flow rule, a non-negative dissipation rate for all possible deformation histories is not guaranteed. Because non-Schmid effects allow for the possibility of a negative dissipation rate, this presentation will focus on addressing the consequences, in a continuum slip crystal plasticity formulation, of the dissipation rate being negative. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Mechanical Properties, Modeling and Simulation |