Elastic J-integral solution for an elbow with axial through-wall crack at crown under in-plane bending

被引:2
作者
Prabhakaran, KM [1 ]
Raj, VV [1 ]
机构
[1] Bhabha Atom Res Ctr, Hlth Safety & Environm Grp, Bombay 400085, Maharashtra, India
关键词
elbow; fracture; through-wall crack; finite element analysis; J-integral;
D O I
10.1016/j.engfracmech.2004.07.009
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Piping elbows under bending moment are vulnerable to cracking at crown. The structural integrity assessment requires knowledge of the J-integral. The J-integral values for axially through-wall cracked thick elbows are not available in the open literature over a certain range. This paper presents a closed form expression for elastic J-integral for 90degrees, long radius elbows subjected to bending moment. The expression is derived, based on the results of a large number of finite element analyses covering a wide range of standard geometries. The analyses were performed using WARP3D software. The present study enables the estimation of the elastic J-integral over a range of R-m/t from 5 to 25 (R-m/t = 5, 6, 7.5, 9, 12, 15, 20 and 25) and thus extends the range of earlier solution towards the thicker elbows used in nuclear industry. The crack angles considered were 9degrees, 18degrees, 27degrees and 36degrees. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1039 / 1047
页数:9
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