Abstract
A hierarchal scale transition technique is introduced to model the effect of imperfect interfaces on the elastoviscoplastic response of composite materials. This novel framework is based on a two-step procedure. In the first step, an inclusion is embedded in a matrix phase and the interface between the two phases is imperfect. The embedded inclusion is homogenized via the use of a Mori-Tanaka scheme. In a second step the homogenized inclusion is introduced in a matrix phase representing the homogeneous equivalent material, and the macroscopic response of the material is obtained via the self-consistent approximation. The model is applied to the case of pure nanocrystalline copper and allows the activity of grain boundary sliding to be quantified.
Original language | English |
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Pages (from-to) | 1546-1554 |
Number of pages | 9 |
Journal | Acta Materialia |
Volume | 56 |
Issue number | 7 |
DOIs | |
State | Published - Apr 2008 |
Keywords
- Grain boundary sliding
- Interface
- Micromechanics
- Nanocrystalline