Abstract
Small scale strain gradient plasticity is coupled with a model of grain boundaries that take
into account the energetic state of a plastically strained boundary and the slip and
separation between neighboring grains. A microstructure of hexagonal grains is
investigated using a plane strain finite element model. The results show that three different microstructural deformation mechanisms can be identified. The standard plasticity case in which the material behaves as expected from coarse grained experiments, the nonlocal plasticity region where size of the microstructure compared to some intrinsic length scale enhances the yield stress and a third mechanism, active only in very fine grained microstructures, where the grains deform mainly in relative sliding and separation.
into account the energetic state of a plastically strained boundary and the slip and
separation between neighboring grains. A microstructure of hexagonal grains is
investigated using a plane strain finite element model. The results show that three different microstructural deformation mechanisms can be identified. The standard plasticity case in which the material behaves as expected from coarse grained experiments, the nonlocal plasticity region where size of the microstructure compared to some intrinsic length scale enhances the yield stress and a third mechanism, active only in very fine grained microstructures, where the grains deform mainly in relative sliding and separation.
| Original language | English |
|---|---|
| Journal | Energy Conversion and Management |
| Volume | 67 |
| Pages (from-to) | 226-239 |
| ISSN | 0196-8904 |
| DOIs | |
| Publication status | Published - 2013 |
Keywords
- Micro-cogeneration
- PI
- PID
- NSGA-II
- PLC