Abstract
Dynamic photoelasticity and high-speed photography have been combined to study fracture of bimaterial interfaces in the subsonic and intersonic regimes. The response of isochromatic fringes to various interface fracture parameters is investigated. Next, a series of experiments is conducted with specially designed specimen geometries under different loading conditions to encompass the whole range of interfacial crack propagation behaviours. The photoelastic data obtained from these experiments is carefully analysed to obtain the crack velocity, complex stress intensity factor, mode mixity and dynamic energy release rate. Finally a fracture criterion in the subsonic regime is proposed and validated with the experimental results.
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