Analytical estimation of stress intensity factors in patched cracked plates

Chandra, Ramesh and Murthy, MVV and Ramamurthy, TS and Rao, AK (1985) Analytical estimation of stress intensity factors in patched cracked plates. Engineering Fracture Mechanics, 21 (1). pp. 479-494. ISSN 0013-7944

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The fatigue and fracture performance of a cracked plate can be substantially improved by providing patches as reinforcements. The effectiveness of the patches is related to the reduction they cause in the stress intensity factor (SIF) of the crack. So, for reliable design, one needs an accurate evaluation of the SIF in terms of the crack, patch and adhesive parameters. In this investigation, a centrally cracked large plate with a pair of symmetric bonded narrow patches, oriented normally to the crack line, is analyzed by a continuum approach. The narrow patches are treated as transversely flexible line members. The formulation leads to an integral equation which is solved numerically using point collocation. The convergence is rapid. It is found that substantial reductions in SIF are possible with practicable patch dimensions and locations.

Item Type: Article
Uncontrolled Keywords: Fracture mechanics;Materials-Crack Propagation;Adhesive bonding;Aircraft structural components;Reinforcing member;Standard repair schemes;Plates
Subjects: ENGINEERING > Structural Mechanics
Depositing User: Ms. Alphones Mary
Date Deposited: 17 Mar 2006
Last Modified: 24 May 2010 04:08

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