Numerical estimation of stress intensity factors in patched cracked plates

Chandra, Ramesh and Guruprasad, K (1987) Numerical estimation of stress intensity factors in patched cracked plates. Engineering Fracture Mechanics, 27 (5). pp. 559-569. ISSN 0013-7944

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Abstract

The fatigue and fracture performance of a cracked plate can be substantially improved, by providing patches as reinforcements. The effectivenessof the patches is related to the reduction they cause in the stress intensity factor (SIF) of the crack. So, for reliable design, one needs an13; accurate evaluation of the SIF in terms of crack, patchand adhesive parameters. In this investigation a finite element technique to compute the SIF through the J-integral for patched cracked plates is presented. TRIM6 and TRUMPL elements of ASKAare employed to model cracked sheet and13; cracked sheet-adhesives-patch regions, respectively. Path independency of J-integral for unpatched plates is shown by considering many contours. For patched plates, the contours chosen do not enclose the patch-cracked sheet region. The values of SIF's are obtained for unpatched edgecracked,13; un patched centre-cracked and patched centre-cracked plates. These values are compared with the analytical and numerical results existing in the literature. This study shows that13; conventional finite elements can be used to model patched cracks and reasonable estimate of SIF can be made via the i-integral.

Item Type: Article
Additional Information: Copyright for this article belongs to Pergamon Journals Ltd.
Uncontrolled Keywords: Numerical estimation;Stress intensity;Cracked plates;Finite element
Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
Depositing User: M/S ICAST NAL
Date Deposited: 16 Oct 2006
Last Modified: 24 May 2010 04:21
URI: http://nal-ir.nal.res.in/id/eprint/3050

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