Effect of nanoscale amorphization on dislocation emission from a semi-elliptical surface crack tip in nanocrystalline materials

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成果类型：

期刊论文

作者：

Jiang, Fujun;Yu, Min*;Peng, Xianghua*;Wen, P. H.

通讯作者：

Yu, Min;Peng, Xianghua

作者机构：

[Jiang, Fujun; Yu, Min] Cent South Univ Forestry & Technol, Coll Civil Engn, Changsha 410004, Peoples R China.

[Peng, Xianghua] Hunan Womens Univ, Coll Informat Sci & Engn, Changsha 410004, Peoples R China.

[Wen, P. H.] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England.

通讯机构：

[Yu, Min] C

[Peng, Xianghua] H

Cent South Univ Forestry & Technol, Coll Civil Engn, Changsha 410004, Peoples R China.

Hunan Womens Univ, Coll Informat Sci & Engn, Changsha 410004, Peoples R China.

语种：

英文

关键词：

Amorphization;Crack propagation;Grain boundaries;Nanocrystalline materials;Nanocrystals;Numerical methods;Stress intensity factors;Surface defects;Amorphizations;Complex variable method;Critical stress intensity factor;Curvature radius;Dislocation emissions;Emission angle;Nano scale;Nanoscale amorphization;Stress-intensity factors;Surface cracks;Crack tips

期刊：

MATHEMATICS AND MECHANICS OF SOLIDS

ISSN：

1081-2865

年：

2022

卷：

期：

页码：

844-857

DOI：

10.1177/10812865211045108

基金类别：

The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors would like to deeply appreciate the support from the Natural Science Foundation of Hunan Province (2021JJ31136), the key scientific research projects of Hunan Provincial Education Department (20A522), the National Natural Science Foundation of China (11602308) and the science and technology innovation Programof Hunan Province (2020RC4049).

机构署名：

本校为第一且通讯机构

院系归属：

土木工程学院

摘要：

An impact analysis model is built to describe the effect of nanoscale amorphization on dislocation emission from a surface semi-elliptical crack tip in nanocrystalline materials. The nanoscale amorphization is formed by the splitting transformation of grain boundary(GB)disclinations caused by the motion of GBs. The analytical solution of the model is obtained by using the complex method, and the influence of nanoscale amorphization, dislocation emission angle, crack length, and curvature radius of surface crack tip on the critical stress intens...

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Effect of nanoscale amorphization on dislocation emission from a semi-elliptical surface crack tip in nanocrystalline materials

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