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contributor authorJ. Chattopadhyay
contributor authorA. K. S. Tomar
contributor authorB. K. Dutta
contributor authorH. S. Kushwaha
date accessioned2017-05-09T00:14:09Z
date available2017-05-09T00:14:09Z
date copyrightAugust, 2004
date issued2004
identifier issn0094-9930
identifier otherJPVTAS-28442#307_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/130677
description abstractA large throughwall circumferential crack in an elbow subjected to in-plane bending moment can significantly reduce its collapse load. Therefore, it is very important to know the collapse moment of an elbow in the presence of a throughwall circumferential crack. The existing closed-form collapse moment equations of throughwall circumferentially cracked elbows are either too conservative or inadequate to correctly quantify the weakening effect due to the presence of the crack, especially for opening mode of bending moment. Therefore, the present study has been carried out to investigate through elastic-plastic finite element analysis the effect of a throughwall circumferential crack on the collapse moment of an elbow under in-plane bending moment. A total of 72 cases of elbows with various sizes of circumferential cracks (2θ=0–150 deg), different wall thickness (R/t=5–20), different elbow bend radii (Rb/R=2,3) and two different bending modes, namely closing and opening have been considered in the analysis. Elastic-perfectly plastic stress-strain response of material has been assumed. Collapse moments have been evaluated from moment-end rotation curves by twice-elastic slope method. From these results, closed-form expressions have been proposed to evaluate collapse moments of elbows under closing and opening mode of bending moment. The predictions of these proposed equations have been compared with 8 published elbow test data and are found to be within ±11% variation except for one case.
publisherThe American Society of Mechanical Engineers (ASME)
titleClosed-Form Collapse Moment Equations of Throughwall Circumferentially Cracked Elbows Subjected to In-Plane Bending Moment
typeJournal Paper
journal volume126
journal issue3
journal titleJournal of Pressure Vessel Technology
identifier doi10.1115/1.1767177
journal fristpage307
journal lastpage317
identifier eissn1528-8978
keywordsFracture (Materials)
keywordsCollapse
keywordsEquations
keywordsStress AND Finite element analysis
treeJournal of Pressure Vessel Technology:;2004:;volume( 126 ):;issue: 003
contenttypeFulltext


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