A Mesoscale Dislocation Mechanics Approach to Dynamically Propagating Shear Bands in Metals
Abstract
The objective of this proposal is to develop and demonstrate the fundamentals of a predictive, computational tool for modeling damage due to propagating localized bands of plastic deformation in metals, in particular shear bands, under both high temperature and room temperature conditions. Shear banding in metals has been studied by using well-established elastic and bulk inelastic response functions. However, these responses by themselves along with the conventional theory of elasto-viscoplastic materials are incapable of representing the existence and the propagation of a deformation band tip curve that propagates in the material thereby extending the thin layer of the deformation band, as overwhelmingly observed in experiment. Proposing an appropriate theory that overcomes this fundamental limitation of conventional theory and its implementation and validation is the primary goal of the project.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 20, 2018
- Source ID
- W911NF1510239
Entities
People
- Amit Acharya
Organizations
- Army Contracting Command
- Massachusetts Institute of Technology
- United States Army