Abstract
A cohesive zone type interface model, taking full account of finite geometry changes, is used to study the decohesion of a viscoplastic block from a rigid substrate. The specific boundary value problem analyzed is a plane strain one with the imposed loading corresponding to overall uniaxial straining. The imperfection takes the form of a non-bonded portion of the interface. Dimensional considerations introduce a characteristic length into the formulation and the decohesion mode shifts from more or less uniform separation along the bond line to crack-like propagation as the ratio of block size to characteristic length increases. Field distributions prior to and accompanying propagation are displayed.
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Needleman, A. An analysis of decohesion along an imperfect interface. Int J Fract 42, 21–40 (1990). https://doi.org/10.1007/BF00018611
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DOI: https://doi.org/10.1007/BF00018611