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Journal of Applied Sciences
  Year: 2005 | Volume: 5 | Issue: 2 | Page No.: 253-256
DOI: 10.3923/jas.2005.253.256
 
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Predicting the Crack Initiation Fracture Toughness for a Crack along the Bimaterial Interface

Q.H. Shah, M. Azram and M.H. Iliyas

Abstract:
Three Point Bend (3PB) bimaterial specimens of PMMA/PC were made by joining the two materials using friction welding. The specimens were tested and the crack initiation loads were recorded to evaluate the KIC using ASTM standard E 1820-01. Stress field in the crack tip vicinity was studied using finite element analysis of the specimen model. Normal and shear stresses were recorded for a series of nodes ahead of the crack tip at (θ=0 ° ). SIF values were calculated using these stress values and it was found that the stresses at a certain distance lying outside the process zone provide a SIF value matching to that of experimental fracture toughness of the specimen under study. Based upon the experimental evidence and finite element analysis, a simple step by step procedure is proposed to calculate the fracture toughness of bimaterials for a complex stress field.
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How to cite this article:

Q.H. Shah, M. Azram and M.H. Iliyas , 2005. Predicting the Crack Initiation Fracture Toughness for a Crack along the Bimaterial Interface. Journal of Applied Sciences, 5: 253-256.

DOI: 10.3923/jas.2005.253.256

URL: https://scialert.net/abstract/?doi=jas.2005.253.256

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