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Two end variable singularity boundary elements and their applications in crack-crack interaction problems

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Title Two end variable singularity boundary elements and their applications in crack-crack interaction problems
 
Creator MUKHOPADHYAY, NK
MAITI, SK
KAKODKAR, A
 
Subject stress intensity factor
finite-element
factor computations
integral method
kinked cracks
point
order
formulation
microcracks
fields
two end variable order strain singularity element
two end variable order traction singularity
element
boundary element
modified crack closure integral
stress intensity factor
accuracy of sif computation
 
Description Two new boundary elements have been proposed for simulation of variable order singularities at the two ends of an element in two dimensions. The first can model the variable order strain singularity at both the ends of the element. The second element can do both the strain and traction singularities simultaneously. The elements are useful for studying the interaction of singularities as in the case of multiple neighbouring cracks in a domain. They are employed here for the computation of stress intensity factors (SIFs) in the crack-crack interaction problems. To improve the accuracy of such computations further a modified crack closure integral (MCCI) based method for mechanical and/or thermal loading is presented. Examples of mode I crack and mixed mode problems under mechanical loading are studied to illustrate the performance of the proposed elements and the MCCI-based calculations. The effects of the order of Gauss quadrature associated with such elements on the accuracy of the SIFs are also reported. Copyright (C) 2000 , Ltd.
 
Publisher JOHN WILEY & SONS LTD
 
Date 2011-08-17T02:09:24Z
2011-12-26T12:55:16Z
2011-12-27T05:44:02Z
2011-08-17T02:09:24Z
2011-12-26T12:55:16Z
2011-12-27T05:44:02Z
2000
 
Type Article
 
Identifier INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 47(8), 1499-1522
0029-5981
http://dx.doi.org/10.1002/(SICI)1097-0207(20000320)47:8<1499::AID-NME847>3.0.CO;2-5
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9702
http://hdl.handle.net/10054/9702
 
Language en