Dynamic initiation and propagation behaviour of sub-interfacial cracks in PMMA/aluminium bi-material system |
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| Authors: | X F YAO H Y YEH W XU |
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| Affiliation: | Department of Engineering Mechanics, FML, Tsinghua University, 100084, Beijing, China;, Department of Mechanical and Aerospace Engineering, California State University, Long Beach, CA 90840-8305, USA |
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| Abstract: | The paper describes studies on the dynamic initiation and growth of sub‐interfacial cracks in a PMMA/aluminium bi‐material system using high‐speed photography combined with the method of caustics. Dynamic fracture phenomena such as crack propagation trajectories, crack velocity, phase angle and stress intensity factor were determined from recordings of a series of dynamic caustic patterns surrounding the propagating sub‐interfacial crack tip.. There is a considerable influence of the distance between the interface and the crack on fracture characterization. |
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| Keywords: | dynamic fracture high-speed photography optical caustics sub-interface crack |
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