Finite element analysis of characteristics of residual strains in cross-sectional specimens of strained-layer materials

Authors
Citation
Cr. Chen et Sx. Li, Finite element analysis of characteristics of residual strains in cross-sectional specimens of strained-layer materials, J MATER SCI, 35(5), 2000, pp. 1145-1152
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE
ISSN journal
00222461 → ACNP
Volume
35
Issue
5
Year of publication
2000
Pages
1145 - 1152
Database
ISI
SICI code
0022-2461(200003)35:5<1145:FEAOCO>2.0.ZU;2-5
Abstract
A procedure for modeling effects of surface stress relaxation in specimens processed from materials with residual strains was described at first, then the anisotropic finite element analysis was performed to study characteris tics of strain relaxation in the cross-sectional specimens of strained-laye r materials. By using the "element death" technique, the finite element mod el of the specimen was separated from the finite element model of the bulk material, and a free surface was created. As a result, effects of surface s tress relaxation during processing specimens were conveniently modeled. The finite element results about strain relaxation in the cross-sectional spec imens of GexSi1-x/Si superlattice were presented. Characteristics about the shear strain near the interface, the strain normal to the surface, and the strain normal to the interface were studied. (C) 2000 Kluwer Academic Publ ishers.