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Predicting the crack initiation fracture toughness for a crack along the bimaterial interface

Shah, Qasim Hussain and Azram, Mohammad and Iliyas, M. H. (2005) Predicting the crack initiation fracture toughness for a crack along the bimaterial interface. Journal of Applied Sciences, 5 (2). pp. 253-256. ISSN 1812-5654

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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 K using ASTM standard E 1820-01. Stress field in the crack tip vicinity was studied using finite element IC analysis of the specimen model. Normal and shear stresses were recorded for a series of nodes ahead of the crack tip at (2=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.

Item Type: Article (Journal)
Additional Information: 3563/5658
Uncontrolled Keywords: Bimaterial, interface, fracture toughness, process zone, finite element analysis, PMMA, PC
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ227 Machine design and drawing
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User: Dr Qasim Hussain Shah
Date Deposited: 17 Jul 2013 15:34
Last Modified: 17 Jul 2013 15:34
URI: http://irep.iium.edu.my/id/eprint/5658

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