The effect of material property gradient on the fracture toughness of a PMMA/PC bimaterial with a crack normal to the interface
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....
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Asian Network for Scientific Information
2005
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/5659/ http://irep.iium.edu.my/5659/ http://irep.iium.edu.my/5659/ http://irep.iium.edu.my/5659/1/476-481.pdf |
| Summary: | 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 bi-material interface. Specimens including monolithic and bi-material 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 each
specimen. It was found that the K values for bi-material specimen could not be achieved by utilizing the inverse IC
square root singularity in stress but it was dependent upon Dundurs parameters for bi-materials. |
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