Energy release rates in patched cracked plates

Chandra, Ramesh and Guruprasad, K and Dwarakanath, K (1988) Energy release rates in patched cracked plates. Engineering Fracture Mechanics, 31 (5). pp. 719-732. ISSN 0013-7944

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The fatigue and fracture performance of a cracked plate can be significantly improved by reinforcing it with high modulus composite material. The reduction in valid fracture mechanics parameters like energy release rate (G) or stress intensity factor (SIF) is measure of effectiveness of the reinforcement. Hence, it is necessary to determine the values of these parameters for plates with and without reinforcements accurately. In this paper, a finite element technique using a general purpose software (ASKA) to compute SIF through G for plates with and without patch reinforcement is presented. The patched plate is modeled by TRIM6, TRUMPL, and QUAD4L. Energy release rate is computed by using the crack-closure integral method. Many crack increments are considered and the need to compute G by extrapolation for zero increment is emphasized. The influence of patch thickness and patch position on SIF (determined via G) is presented in graphical form. (Author)

Item Type: Article
Additional Information: Copyright for this article belongs to Elsevier Science
Uncontrolled Keywords: Cracking (fracturing);Fatigue(materials);Finite element method;Perforated plates;Plates(structural members);Strain energy;Release rate;Composite materials;Computerized simulation;Crack tips;Patch tests;Stress intensity factors
Subjects: AERONAUTICS > Aerodynamics
Depositing User: M/S ICAST NAL
Date Deposited: 08 Feb 2010
Last Modified: 07 May 2012 05:26

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