The authors would like to deeply appreciate the support from the National Natural Science Foundation of China (Grant No. 11602308 ) and the Hunan Province Key Laboratory of Engineering Rheology of Central South University of Forestry and Technology (No. 19HNKLE06 ).
机构署名：
本校为第一且通讯机构
院系归属：
土木工程学院
涉外学院
摘要：
A theoretical model describing edge dislocation emission from an elliptical blunt crack tip in nanocrystalline solid is established to consider the effect of the nanotwin and dislocation pileup at twin boundary. The nanotwin is represented by a wedge disclination quadrupole and some dislocations are deposited on one of twin boundaries. The complex variable function method is used to calculate the force acting on the first dislocation emitted from the tip of blunt crack, and expressions of critical stress intensity factors corresponding to dislo...
