215103 照射材料の力学特性に関するマルチスケールモデリング(OS08 マルチディシプリナリ・デザイン科学1(組織と変形のマルチスケール解析),オーガナイズド・セッション)

概要

論文の詳細を見る
Crystal defects induced by irradiation obstruct dislocation movement. Hence, the critical resolved shear stress of irradiated material increases. While part of the radiation defects is swept by dislocations released from dislocation sources, therefore localization of plastic deformation are caused by decrease of radiation defects at the partial region. In this study, in order to predict increase of flow stress due to irradiation, information of densities of radiation defects is introduced into a hardening modulus of crystal. Moreover, decrease of work-hardening ratio is represented by considering disappearance of radiation defects originating in dislocation movement. Values of controlling parameters operating effect of radiation defects on flow stress are decided by a molecular dynamics simulation. We conduct crystal plasticity simulations for copper single crystal under simple tensile condition. The macroscopic stress-strain responses such as increase of yield stress and decrease of work-hardening ratio due to irradiation are numerically predicted.
一般社団法人日本機械学会の論文
2011-03-17