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Simulating strain due to lattice mismatch
Posted Jul 28, 2015, 2:45 a.m. EDT Mesh, Modeling Tools & Definitions, Parameters, Variables, & Functions, Structural Mechanics Version 5.0 1 Reply
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I'm trying to simulate the strain that is developed due to lattice mismatch in a core/shell structure, where a shell of one material is epitaxially grown on a sphere of another material, with a small lattice mismatch between the two. I use COMSOL 5.0 and the Structural Mechanics Module for it.
How can I simulate the lattices of the two semiconductor materials and the displacements that are caused by the mismatch?
I found a thesis (see attached, chapter 2.8.2, page 41-46, step 2-4c) where a similar simulation is preformed (for a more complex geometry).
There are a few things described there, which I don't know how to do:
1. How can I define 10-node quadratic tetrahedron elements for the mesh?
2. Anisotropic elastic stiffness matrix and lattice constants are defined as inputs to the calculations. How can I define those inputs in the software? How are they being used in the module?
I'd really appreciate any guidance.
Thank you,
Anna
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Hello Anna Rubin
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Did your problem has been solved ? I've met the question as you too. could you tell me the solution if you have solved the problem?
Thank you,
DaoFu Jiang