Dr Edmund Tarleton, Department of Engineering Science, Univeristy of oxford, UK

Simulating micromechanical tests using discrete dislocation and crystal plasticity
When Feb 03, 2020
from 02:00 PM to 03:00 PM
Where LR1
Contact Name
Contact Phone 01865 273651
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Micromechanical tests allow individual material features to be studied in detail. The sample volumes are sufficiently small (10 m3) to allow accurate 3D simulation of micromechanical tests at the discrete dislocation level. This talk will provide an overview of two codes currently being developed in Oxford. The first is a 3D discrete dislocation plasticity model which is coupled to an elastic FE code to simulate finite volumes of material. This approach has been used to simulate the influence of hydrogen on dislocation plasticity and to study dislocation climb over precipitates. The second is a dislocation based crystal plasticity model which can be calibrated using the DDP code and allows anisotropic elasticity and finite deformations. Some crystal plasticity simulations of nano-indentation in a range of materials will be presented and compared to discrete dislocation plasticity. Potential future applications and development will also be discussed.