Nonlinear FE analysis of residual stresses induced by dislocations in heterostructures
| Autor: | Sławomir Kret, G. Jurczak, J.Y. Laval, Paweł Dłużewski, G. Maciejewski |
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| Rok vydání: | 2004 |
| Předmět: |
General Computer Science
Condensed matter physics Chemistry business.industry General Physics and Astronomy General Chemistry Finite element method Surface tension Condensed Matter::Materials Science Computational Mathematics Nonlinear system Optics Mechanics of Materials Residual stress Lattice (order) General Materials Science Boundary value problem Dislocation High-resolution transmission electron microscopy business |
| Zdroj: | Computational Materials Science. 29:379-395 |
| ISSN: | 0927-0256 |
| DOI: | 10.1016/j.commatsci.2003.10.012 |
| Popis: | In this paper the field theory of dislocations is used in the finite element analysis of residual stresses in epitaxial layers. By digital processing of the HRTEM image of a GaAs/ZnTe/CdTe system the tensor maps of dislocation distribution are extracted. Such obtained maps are used as the input data to the finite element code. The mathematical foundations of this code are based on the compatibility equations for lattice distortions. The surface tension induced by misfit dislocations is considered here in terms of a 3D boundary-value problem for stress equilibrium in the interfacial zone. The numerical results show how strongly the surface tension depends on the nonlinear elastic behaviour of the crystal structure. |
| Databáze: | OpenAIRE |
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