SEDL / STP / STP627-EB / STP27378S

Dynamic Analysis of Crack Propagation and Arrest in the Double-Cantilever-Beam Specimen

Kanninen, MF
Senior research scientist and principal researcher, Applied Solid Mechanics Section, Battelle Columbus Laboratories, Columbus, Ohio

Popelar, C
Professor, Ohio State University, Columbus, Ohio

Gehlen, PC
Senior research scientist and principal researcher, Applied Solid Mechanics Section, Battelle Columbus Laboratories, Columbus, Ohio

Pages: 20    Published: Jan 1977

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Abstract

A simple one-dimensional analysis model was developed previously for rapid unstable crack propagation and arrest in wedge-loaded rectangular double-cantilever-beam (DCB) specimens. In this paper, the model is generalized to treat contoured specimens and machine-loading conditions. The development starts from the basic equations of the two-dimensional theory of elasticity with inertia forces included. Exploiting the beam-like geometry of the DCB specimen results in governing equations that are analogous to a variable-height Timoshenko beam partly supported by a generalized elastic foundation. These are solved by a finite-difference method. Crack propagation arrest results illustrating the effect of specimen geometry and loading conditions are described in the paper.