Stress intensity factors of rectangular shape cracks for crack growth prediction

被引：7

作者：

Kamaya, Masayuki ^{[1
,4
]}

Sugamura, Kenji ^{[2
]}

Okada, Hiroshi ^{[3
]}

机构：

[1] Inst Nucl Safety Syst Inc, Fukui, Japan

[2] Tokyo Univ Sci, Grad Sch Sci & Technol, Dept Mech Engn, Tokyo, Japan

[3] Tokyo Univ Sci, Fac Sci & Technol, Dept Mech Engn, Tokyo, Japan

[4] 64 Sata, Mihama, Fukui 9191205, Japan

来源：

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 2023年 / 201卷

关键词：

Stress intensity factor; Rectangular crack; Crack growth; Fitness-for-service assessment; Line-propagation stress intensity factor; TETRAHEDRAL FINITE-ELEMENT; INTERACTING SURFACE CRACKS; SIMULATION; PARALLEL;

D O I：

10.1016/j.ijpvp.2022.104864

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study aimed at modeling cracks as a rectangular shape to predict crack growth for fitness-for-service as-sessments. Crack extension driving force was represented by a newly proposed line propagation stress intensity factor (LP-SIF), in which, not a point, but a line on a crack front was assumed to grow in the virtual crack extension for the elastic J-integral calculation. LP-SIF could be derived using the conventional point propagation SIF. It was shown that growth prediction of a rectangular crack using the LP-SIF was more conservative than that obtained by crack growth simulation, in which crack growth was calculated at each node along the crack front. In order to apply the LP-SIF for general use, LP-SIF solutions for various pipe and crack geometries and stress distributions were obtained by finite element analyses. The accuracy of the obtained SIFs was confirmed by comparing with analysis results obtained by two research organizations.

引用

页数：19

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