期刊论文

Peng, Xianghua

英文

Engineering Fracture Mechanics

0013-7944

2018

202

288-296

10.1016/j.engfracmech.2018.09.025

The authors would like to deeply appreciate the support from the National Natural Science Foundation of China (Grant No. 11602308 ). The work was also supported by the Introducing High-level Talent Research Fund of Central South University of Forestry and Technology ( 104-0096 ). Appendix A

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The effects of the nanotwin and dislocation pileup at the twin boundary on lattice dislocation emission from a surface semi-elliptical blunt crack in deformed nanocrystalline materials (NCMs) are investigated. The nanotwin as a stress source can be described by a wedge disclination quadrupole. Using the complex variable method, complex analytic solution of stress field, the dislocation force and the critical stress intensity factors (SIFs) for the first edge dislocation emission were obtained. Then, through numerical calculation, the influence ...