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Proceedings Paper

KI stress intensity factor of cracks with a hard inclusion by finite element method and reflection photoelasticity technique
Author(s): Wiroj Limtrakarn; Anocha Namlaow
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Paper Abstract

A finite element method and reflection photoelastic techniques are presented to determine the KI stress intensity factor of cracks with hard inclusion and several crack length per width for two-dimensional fracture mechanics problems. The paper starts from describing two-dimensional fracture mechanics theory and finite element formulation using the quadrilateral and triangular finite elements. The computational procedure and related finite element equations are explained. The reflection photoelastic theory and its experimental procedure with the use of the stress optic laws are then described. Performance of both techniques is evaluated by analyzing a single edge cracked plate made from polycarbonate. A plate with a hard inclusion is studied. The hard inclusion is made from aluminum. The KI stress intensity factor is found to be a function of the crack length per width. The both results are evaluated with Brown. This example demonstrates the efficiency of the finite element method to provide accurate solutions as compared to those from the reflection photoelastic technique.

Paper Details

Date Published: 14 April 2010
PDF: 10 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75221I (14 April 2010); doi: 10.1117/12.851718
Show Author Affiliations
Wiroj Limtrakarn, Thammasat University (Thailand)
Anocha Namlaow, Thammasat University (Thailand)

Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)

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