A methodology for measuring interface fracture properties of composite materials |
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Authors: | Leslie Bank-Sills Nahum Travitzky Dana Ashkenazi Rami Eliasi |
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Abstract: | A methodology is presented for measuring interface fracture properties of composite materials. A bimaterial Brazilian disk specimen with a crack along the interface is employed. The specimen is analyzed by means of the finite element method and a conservative integral to determine stress intensity factors as a function of loading angle and crack length. A weight function is employed to determine the effect of residual curing stresses on the stress intensity factors. These are combined to determine the critical interface energy release rate
ic as a function of stress intensity phase angle for tests carried out on a glass/epoxy material pair. |
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Keywords: | Interface fracture mechanics weight function finite elements conservative integral interface fracture toughness |
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