Intensity of stress singularity for the circumferential V-shape corner front of a three-dimensional diamond-like defect

被引:7
|
作者
Ping, X. C. [1 ,2 ,3 ]
Zhang, Y. X. [1 ,2 ]
Guo, Y. B. [1 ,2 ]
Xiao, Z. M. [3 ]
Jalde, J. [3 ]
Chen, M. C. [4 ]
机构
[1] Tianjin Univ Sci & Technol, Sch Mech Engn, Tianjin, Peoples R China
[2] Tianjin Key Lab Integrated Design & On Line Monit, Tianjin, Peoples R China
[3] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore, Singapore
[4] East China Jiaotong Univ, Sch Civil Engn, Nanchang, Jiangxi, Peoples R China
基金
中国国家自然科学基金;
关键词
circumferential corner front; diamond-like defect; generalized stress intensity factor; singular element; ANISOTROPIC BIMATERIALS; INTERFACIAL CORNER; ANGULAR CORNERS; NOTCH; FIELD; MODE; INCLUSION; PLATES; POINT; JUNCTION;
D O I
10.1111/ffe.13189
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Three-dimensional diamond-like defects with circumferential V-shape corner fronts are often contained in engineering materials. In this paper, generalized stress intensity factors are calculated for this type of defect using a modified advanced finite element method. A super corner front element model in the global coordinates is established to capture the stress singularities along the circumferential corner front. Three-dimensional numerical series eigen-solutions in the element have been transformed from asymptotic expressions in the local curvilinear coordinates. The element is suitable for a sharp V-shape corner with arbitrary opening and inclination angle. Singular stress fields near various shapes of diamond-like defects are systematically investigated. The interaction of an embedded defect with free surface or another identical defect is also investigated. The numerical results can be used as stress intensity parameters to predict fatigue strength at circumferential corner front of a diamond-like defect.
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页码:802 / 817
页数:16
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