Determination of T-stress using finite element analysis

A method that uses finite element analysis to determine the non-singular stress （T-stress） at a crack tip is proposed in this study. T-stress includes two components： the Tx-stress parallel to the tangent of the crack at its tip and the Ty-stress perpendicular to this tangent. The effects of contact...

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Bibliographic Details
Published in:Science China. Technological sciences 2017-08, Vol.60 (8), p.1211-1220
Main Authors: Tang, ShiBin, Dong, Zuo, Huang, RunQiu
Format: Article
Language:English
Subjects:
Contact stresses
Engineering
Finite element analysis
Finite element method
Flanks
Friction
Mathematical analysis
巴西圆盘
应力测定
应力计算方法
数值计算
有限元分析
组成部分
裂纹尖端
载荷条件
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Summary:A method that uses finite element analysis to determine the non-singular stress （T-stress） at a crack tip is proposed in this study. T-stress includes two components： the Tx-stress parallel to the tangent of the crack at its tip and the Ty-stress perpendicular to this tangent. The effects of contact and friction on both the Tx- and Ty-stresses on the crack flanks are considered in the method. Because the method uses a single standard elastic finite element analysis derived directly from the equation of the stress fields around the crack tip and does not require any assumptions or simplification, it can be used to determine the T-stress for any given geometry and loading condition. Theoretical results are used to calibrate the results, which exhibited good agreement and to discuss the T-stress computational methodology. Furthermore, the Tx- and Ty-stresses in center-cracked Brazilian disc （CCBD） specimens subjected to diametrical or partially distributed compression were numerically computed, and the effects of contact and friction on the Tx- and Ty-stresses are discussed.
ISSN:1674-7321
1869-1900
DOI:10.1007/s11431-016-0835-2