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contributor authorC.-K. Fang
contributor authorE. Kannatey-Asibu
contributor authorJ. R. Barber
date accessioned2017-05-08T23:54:04Z
date available2017-05-08T23:54:04Z
date copyrightAugust, 1997
date issued1997
identifier issn1087-1357
identifier otherJMSEFK-27299#281_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/119024
description abstractAn analytical expression is developed for the relationship between far-field acoustic emission (AE) signal and the propagation of a finite plane crack due to a nonuniform residual stress in a weldment. The AE sensor is situated at the boundary parallel to the crack surface. The quasi-static crack opening displacement (COD) rate is used as the source function. The AE initial response on a traction-free surface is obtained as a function of instantaneous crack length and speed. A closed-form expression is obtained for the normal surface displacement at the epicenter when the crack propagates at uniform speed for a finite duration between initiation and arrest. Results from an earlier analysis of the (variable) speed of crack propagation in a weldment are used to develop a more exact numerical prediction of the surface motion. The effects of initial crack length and bluntness on AE surface motion are investigated in both time and frequency domains.
publisherThe American Society of Mechanical Engineers (ASME)
titleFar-Field Initial Response of Acoustic Emission From Cracking in a Weldment
typeJournal Paper
journal volume119
journal issue3
journal titleJournal of Manufacturing Science and Engineering
identifier doi10.1115/1.2831105
journal fristpage281
journal lastpage289
identifier eissn1528-8935
keywordsAcoustic emissions
keywordsFracture (Process)
keywordsFracture (Materials)
keywordsMotion
keywordsDisplacement
keywordsSignals
keywordsTraction
keywordsCrack propagation
keywordsStress AND Sensors
treeJournal of Manufacturing Science and Engineering:;1997:;volume( 119 ):;issue: 003
contenttypeFulltext


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