Abstract
To obtain the specimen dimension dependence of J IC and tearing modulus T, these fracture parameters are expressed in terms of CTOA which is then obtained as a function of specimen ligament. It is shown that crack tip opening angle (CTOA) is the sum of two terms: one associated with the “global deformation field” of the specimen and the other with the crack tip necking. It is also shown that the contribution of crack tip necking to CTOA is specimen ligament dependent. Using these results and the fracture kinematics based on CTOA, it is theoretically obtained the J IC and tearing modulus dependence on specimen dimension and it is theoretically demonstrated the empirical Priest law for the specific fracture energy.
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