NIAI Superalloy Modeling Based on Combined Dislocation Mechanics and Phenomenological Plasticity
Abstract
This brief report presents the progress made in the September 2004-August 2005 period. This is primarily joint work with Ms. Aarti Sawant, graduate student working with the PI (but not supported by this project). The analysis of metal plasticity based on a (physically) rigorous connection to its origins in the mechanics of defects in elastic solids is a complex matter. The primary source of complexity arises in achieving an adequate theory that can describe the dynamics of crystal defects, namely dislocation distributions, as it arises from the interaction of the stress fields of these defects as well as applied loads. Also, simply calculating the stress field of a dislocation distribution in a body undergoing finite deformations and whose crystal elastic response is non-convex is not a trivial matter. Moreover, even if such a theory could be developed, its physical resolution would have to be in the nanometer scale, whereas the effects of the physical mechanisms described above are manifest in plasticity even at the micron scale and above one important example being the analysis of plasticity of superalloy materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2005
- Accession Number
- ADA448426
Entities
People
- Amit Acharya
Organizations
- Carnegie Mellon University