Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 08, 2016 - October 10, 2016
Misfit dislocations appear along the interfaces between dissimilar materials due to the gap of lattice size. Since misfit dislocations affect stress field around the interface greatly, it is important to evaluate stress field around the misfit dislocations. However, the accurate elastic solution has not been obtained. In this study, we obtained the elastic solution around the interface with misfit dislocations by superposing two stress fields, which are derived from coherent elastic strain and misfit dislocations. Then, We assumed periodic misfit dislocations. The elastic solution around a misfit dislocation was obtained from Stroh formalism. We also analyzed stress field around the interface between dissimilar materials using molecular statics method. By comparing the result of molecular statics method with the elastic solution, we investigated the validity of the obtained elastic solution. The comparison was carried out in the case of the combination of ideal materials, and their gap of lattice size were assumed to be 10% and 3.3% in order to investigate the effect of dislocation on the stress field along the interfaces.
