KI stress intensity factor of cracks with a hard inclusion by finite element method and reflection photoelasticity technique

Wiroj Limtrakarn; Anocha Namlaow

doi:10.1117/12.851718

14 April 2010 KI stress intensity factor of cracks with a hard inclusion by finite element method and reflection photoelasticity technique

Wiroj Limtrakarn, Anocha Namlaow

Author Affiliations +

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75221I (2010) https://doi.org/10.1117/12.851718
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

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.

Citation Download Citation

Wiroj Limtrakarn and Anocha Namlaow "KI stress intensity factor of cracks with a hard inclusion by finite element method and reflection photoelasticity technique", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75221I (14 April 2010); https://doi.org/10.1117/12.851718

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