EFFECTS OF SURFACE ELASTICITY ON MIXED-MODE FRACTURE

被引：20
|
作者：
Fu, X. L. [1 ]
Wang, G. F. [1 ]
Feng, X. Q. [2 ]
机构：
[1] Xi An Jiao Tong Univ, Dept Engn Mech, SVL, Xian 710049, Peoples R China
[2] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China
来源：
INTERNATIONAL JOURNAL OF APPLIED MECHANICS | 2011年 / 3卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Crack; surface effect; mixed-mode fracture; stress intensity factor; finite element method; STRESS; INHOMOGENEITIES; BEHAVIOR; SOLIDS;
D O I：
10.1142/S1758825111001068
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Surface effects often significantly alter the physical and mechanical properties of nanosized materials and devices. In the present paper, we investigate the influence of surface elasticity on the mixed-mode fracture by a new finite element method with surface effects being incorporated. It is found that when the curvature radius at the crack root shrinks to nanometers, surface elasticity considerably affects the local stress distributions in the vicinity of the crack tip. Using the fracture criterion of maximum hoop stress, the influences of surface elasticity on the critical stress intensity factor and the propagation direction are addressed.
引用
收藏
页码：435 / 446
页数：12
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