Dislocation emission from an elliptically blunted crack tip with surface effects

Fang QH; Liu Y; Liu YW; Huang BY

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Dislocation emission from an elliptically blunted crack tip with surface effects

机译：具有表面效应的椭圆钝化裂纹尖端的位错发射

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摘要

The explicit expressions for critical stress intensity factors are derived for edge dislocation emission from an elliptically blunt crack with surface effects under mode I and mode II loadings. The influence of surface effects on dislocation emission criterion is analyzed. The result indicates the impact of the surface stress becomes remarkable for nanoscale blunted cracks and some particular materials, which cannot only affect the value of the critical stress intensity factors for dislocation emission, but also alter the emission angle.

机译：临界应力强度因子的明确表达式是在模式I和模式II载荷下，从具有表面效应的椭圆形钝裂纹的边缘位错发射中得出的。分析了表面效应对位错发射准则的影响。结果表明，表面应力对纳米级钝化裂纹和某些特殊材料的影响变得显着，不仅影响位错发射的临界应力强度因子的值，而且改变发射角度。

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《Physica, B. Condensed Matter》 |2009年第20期|共4页
作者
Fang QH; Liu Y; Liu YW; Huang BY;
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正文语种 eng
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关键词
Edge dislocation; Blunt crack; Surface stress; Dislocation emission;

机译：边缘错位;钝裂纹;表面应力;位错发射;

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专利

1. Dislocation emission from an elliptically blunted crack tip with surface effects [J] . Fang QH, Liu Y, Liu YW, Physica, B. Condensed Matter . 2009,第20期

机译：具有表面效应的椭圆钝化裂纹尖端的位错发射
2. EFFECTS OF DISLOCATION CONFIGURATION, CRACK BLUNTING AND FREE SURFACES ON THE TRIGGERING LOAD OF DISLOCATION SOURCES [J] . Lu Zhixing, Wang Xuyue, Yu Shouwen, Acta Mechanica Solida Sinica . 2007,第2期

机译：位错配置，裂纹扩展和自由表面对位错源触发负载的影响
3. EFFECTS OF DISLOCATION CONFIGURATION, CRACK BLUNTING AND FREE SURFACES ON THE TRIGGERING LOAD OF DISLOCATION SOURCES [J] . Lu, Zhixing, Wang, 固体力学学报：英文版 . 2007,第002期

机译：位错配置，裂纹扩展和自由表面对位错源触发负载的影响
4. On the Stress Field and Dislocation Emission of an Elliptically Blunted Mode III Crack with Surface Stress Effect [C] . J. Luo IUTAM Symposium on Surface Effects in the Mechanics of Nanomaterials and Heterostructures . 2013

机译：椭圆形钝化模式III裂缝的应力场和位错发射，表面应力效应
5. Analysis of beveled semi-elliptical surface cracks in friction stir plug welded plates made of Al 2195 alloy [D] . Vadakke Veetil, Rahul 2011

机译：Al 2195合金搅拌摩擦塞焊接板的斜面半椭圆表面裂纹分析。
6. Weight Function Method for Stress Intensity Factors of Semi-Elliptical Surface Cracks on Functionally Graded Plates Subjected to Non-Uniform Stresses [O] . Kun-Pang Kou, Jin-Long Cao, Yang Yang, 2020

机译：具有非均匀应力的功能梯度板上半椭圆形表面裂缝应力强度因子的重量函数方法
7. Nanoscale rotational deformation effect on dislocation emission from an elliptically blunted crack tip in nanocrystalline materials [O] . Feng H., Fang Q.H., Liu Y.W., 2014

机译：纳米级旋转变形对纳米晶材料中椭圆钝化裂纹尖端的位错发射的影响
8. Crack-Face Displacements for Embedded Elliptic and Semi-Elliptical Surface Cracks [R] . Raju, I. S. 1989

机译：嵌入椭圆和半椭圆表面裂纹的裂纹面位移

Dislocation emission from an elliptically blunted crack tip with surface effects

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