Empirical Solution of Stress Intensity Factors for the Inclined Inner Surface Crack of Pipe under External Pressure and Axial Compression

被引：9

作者：

Yao, Xi-Ming ^{[1
,2
]}

Zhang, Yu-Chen ^{[1
,2
]}

Pei, Qi ^{[1
,2
]}

Jin, Li-Zhu ^{[1
,2
]}

Ma, Tian-Hao ^{[1
,2
]}

He, Xiao-Hua ^{[1
,2
]}

Zhou, Chang-Yu ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ, Sch Mech & Power Engn, Nanjing 211816, Peoples R China

[2] Jiangsu Key Lab Design & Manufacture Extreme Press, Nanjing 211816, Peoples R China

来源：

MATERIALS | 2023年 / 16卷 / 01期

基金：

中国国家自然科学基金;

关键词：

inclined surface crack; stress intensity factor; pipe; crack closure; external and axial pressure; finite element analysis; CIRCUMFERENTIAL CRACKS; FRICTIONAL SURFACES; SEMIELLIPTIC CRACK; WEIGHT-FUNCTIONS; HOLLOW CYLINDER; MODE-II; CONTACT; TENSION; PLATE;

D O I：

10.3390/ma16010364

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Based on fracture mechanics theory, a finite element method was used to determine the stress intensity factors of the inclined crack on the inner surface of the pipe under axial compression load and external pressure. The effects of different influencing factors on the stress intensity factor along the crack front considering crack closure were systematically explored, which were different to those under internal pressure. The effects of high aspect ratio on K-II, the crack inclination asymmetry caused by curvature and the effects of the friction coefficient on the stress intensity factors of the pipe with an inclined inner surface crack under axial compression load and external pressure were explored in this paper. To be fit for defect assessment, the solutions for stress intensity factors K-II and K-III were derived, and new correction factors f(theta) and f(mu) were proposed in the empirical solutions to accommodate the crack inclination asymmetry and the friction coefficient, respectively.

引用

页数：16

共 39 条

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