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 bimaterial. Polymethylmethacrylate Acrylic (PMMA) and Polycarbonate (PC) cylindrical rods were joined together using the friction welding process. CT specimens were machined out of the bimaterial cylindrical rods. A sharp crack was introduced into the specimen perpendicular to and terminating at the bimaterial interface. Specimens including monolithic and bimaterial were loaded to fracture and experimental values of K were obtained. Finite element analysis was used to find out the stresses IC in the specimens. Subsequently the stress values were used to find out the fracture toughness of eac h specimen. It was found that the K values for bimaterial specimen could not be achieved by utilizing the inverse IC square root singularity in stress but it was dependent upon Dundurs parameters for bimaterials.
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