Dynamic fracture of curved interfaces

Document Type

Article

Date of Original Version

12-1-1999

Abstract

Dynamic fracture of curved interfaces between two dissimilar materials has been investigated. The bimaterial specimen consists of a polymeric material bonded directly to an aluminum half. The dynamic loading is achieved by detonating explosive in a specially designed specimen. The interfacial fracture phenomenon is recorded using dynamic photoelasticity in combination with high-speed photography. The isochromatic fringe patterns are analyzed to obtain the histories of complex stress intensity factor, dynamic energy release rate and mixity. The results show that as the interface curvature decreases the peak tangential crack-tip velocity increases. Also, it is observed that the crack-tip velocity-mixity relationship depends significantly on the interface curvature. Finally, the results indicated energy release rate-crack-tip velocity relationship is independent of the interface curvature.

Publication Title, e.g., Journal

International Journal of Fracture

Volume

100

Issue

3

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