Photoelastic determination of stress intensity factors in patched cracked plates

Subramanian, A and Chandra, R and Murthy, MVV and Rao, AK (1983) Photoelastic determination of stress intensity factors in patched cracked plates. Engineering Fracture Mechanics, 18 (2). pp. 305-313. ISSN 0013-7944

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Abstract

In this paper, the influence of patch parameters on stress intensity factors in edge cracked plates is studied by employing transmission photoelasticity. Edge cracked plates made of photo-elastic material are patched on one side only by E glass-epoxy and carbon-epoxy unidirectional composites. The patch is located on the crack in such a way that the crack tip is not covered. Magnified isochromatic fringes are obtained by using a projection microscope of magnification 50, converted into a polariscope. Irwin's method is used to compute stress intensity factors from photoelastic data. The reduction in stress intensity factors is presented in graphical form as a function of patch parameters, namely stiffness, location and length. An empirical equation connecting reduction in stress intensity factor and these patch parameters is presented.

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to Elsevier Science Ltd.
Uncontrolled Keywords:	Epoxy matrix composites;Notch tests;Photoelastic analysis;Reinforced plates; Reinforcement (structures);Stress intensity factors;Carbon fibers;E glass;Fabrication; Plates (structural members);Plates;Stress;Stiffness;Crack propagation;Numerical analysis;wPhotoelasticity;Tensile strenagth
Subjects:	CHEMISTRY AND MATERIALS > Composite Materials
Division/Department:	Structures Division, Structures Division, Structures Division, Structures Division
Depositing User:	Ms. Alphones Mary
Date Deposited:	08 Feb 2010
Last Modified:	03 May 2012 10:17
URI:	http://nal-ir.nal.res.in/id/eprint/853

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