The effect of material property gradient on the fracture toughness of a PMMA/PC bimaterial with a crack normal to the interface. | [Journal of Applied Sciences • 2005]

Author(s):

1. Q. H. Shah: Department of Manufacturing and Materials Engineering, International Islamic University Malaysia Jalan Gombak (53100) Kuala Lumpur Malaysia

2. M. H. Iliyas: Department of Manufacturing and Materials Engineering, International Islamic University Malaysia Jalan Gombak (53100) Kuala Lumpur Malaysia

3. A. F. Ismail: Department of Manufacturing and Materials Engineering, International Islamic University Malaysia Jalan Gombak (53100) Kuala Lumpur Malaysia

4. H Homma: Department of Mechanical Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka Toyohashi, Japan

Abstract:

Fracture toughness tests on CT specimens were carried out to study the fracture behavior for a crack lying perpendicular to the interface in a PMMA/PC biomaterial. Polymethylmethacrylate Acrylic (PMMA) and Polycarbonate (PC) cylindrical rods were joined together using the friction welding process. CT specimens were machined out of the biomaterial cylindrical rods. A sharp crack was introduced into the specimen perpendicular to and terminating at the biomaterial interface. Specimens including monolithic and biomaterial were loaded to fracture and experimental values of K1c were obtained. Finite element analysis was used to find out the stresses in the specimens. Subsequently the stress values were used to find out the fracture toughness of each specimen. It was found that the K1c values for biomaterial specimen could into be achieved by utilizing the inverse square root singularity in stress but it was dependent upon Dundurs parameters for bimaterials.

Page(s): 476-481

DOI: DOI not available

Published: Journal: Journal of Applied Sciences, Volume: 5, Issue: 3, Year: 2005

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