A modified crack closure integral method for calculating stress intensity factors for cracked plates subject to bending loads

Viswanath, S and Lakshminarayana, HV and Ravindranath, DD (1989) A modified crack closure integral method for calculating stress intensity factors for cracked plates subject to bending loads. International Journal of Fracture, Vol. 4. R45-R50. ISSN 0376-9429

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Abstract

A method is developed to calculate strain energy release rates, G, or stress intensity factors, K, using only nodal forces and displacements from a standard finite element analysis code. The method is an extension of the modified crack closure integral (MCCI) approach to the bending of plates with through cracks. An examination of bending of plates with through cracks based on shear deformation theories has shown that the bending K depends strongly on the ratio of plate thickness, h, and half crack length, a. Hence, the need to examine the effect of h/a on the accuracy of G and K obtained by the MCCI approach is examined. The accuracy of the MCCI method is verified by analyzing a square plate with a central crack subjected to a uniform edge moment and comparing the results with those reported in the literature.

Item Type:	Article
Additional Information:	Copyright for this article belongs to Kluwer Academic Publishers Group
Uncontrolled Keywords:	Bend testa;Crack closure;Perforated plates;Plate theory;Strain energy release rate;Stress intensity factors; Crack tips;Failure modes;Finite element method;Loading rate; Stress distribution
Subjects:	ENGINEERING > Structural Mechanics
Depositing User:	shankar sk nadoor
Date Deposited:	18 Oct 2006
Last Modified:	24 May 2010 04:22
URI:	http://nal-ir.nal.res.in/id/eprint/3117

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