Prasad, PBN and Simha, KRY (2004) Disc analogy for approaching circular arc cracks. In: International Journal of Fracture, 125 (1-2). 51 -71.
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The limiting situation of a pair of approaching circular arc crack tips in a homogeneous medium is examined to draw analogies with circular disc problems. As the crack tips approach each other, the narrow material ligament bridging the crack tips controls the stresses, stress intensity factors and energy release rates. In particular, this ligament sets up the length scale for singularity analysis for a given radius of the arc crack. Following a detailed analytical examination of approaching crack tips, a photoelastic visualisation of the stress field is presented. Experimental isochromatics are also compared with theoretical predictions for some specific cases. Finally, based on the ideas developed in this paper, existing notions on interacting cracks and cavities treated in the literature are reinterpreted.
|Item Type:||Journal Article|
|Additional Information:||copyright of this article belongs to Kluwer Academic Publishers.|
|Keywords:||Arc cracks;crack propagation;energetics;isochromatics.|
|Department/Centre:||Division of Mechanical Sciences > Mechanical Engineering|
|Date Deposited:||18 Dec 2008 11:23|
|Last Modified:||19 Sep 2010 04:54|
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