| About this Abstract |
| Meeting |
2017 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Metallic Glasses XIV
|
| Presentation Title |
Modeling Deformation in Amorphous Materials via Evolution of Discrete Shear Transformation Zones |
| Author(s) |
Babak Kondori, Ahmed Amine Benzerga, Alan Needleman |
| On-Site Speaker (Planned) |
Babak Kondori |
| Abstract Scope |
A methodology for solving small strain boundary value problems where plastic deformation arises from the collective activation of discrete shear transformation zones (STZs) is presented. The STZs are treated as transforming Eshelby inclusions. At each instant, superposition is used to represent the solution in terms of the fields from STZs, which are given analytically for each STZ in an infinite elastic medium, and an image solution that enforces the prescribed boundary conditions on the finite solid of interest. The image problem corresponds to a standard linear elastic boundary value problem. Constitutive relations are specified for the kinetics of the transformation. The general three-dimensional formulation is given. Solutions for compression of blocks and notched bar tension, all in plane-strain condition, are presented that illustrate the potential of the framework. The results also reveal various aspects of deformation in amorphous materials and their dependence on size, loading condition and initial microstructure. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |