On the double cantilever beam technique for studying crack propagation

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Abstract
The problem of a semi-infinite elastic plate loaded along its straight boundary is pursued to develop an analytical and realistic Double Cantilever Beam Model which accounts for the end deflections associated with deformation beyond the crack tip. Deformation of the uncracked portion allows each arm to rotate about the built-in end, producing an end deflection in addition to those caused by bending and shear. Comparisons with the predictions of existing models show reasonable agreement, but comparisons with some available experimental results reveal that the theoretical end deflection is underestimated. This was shown not to be unreasonable when the limitations of the theory were considered.

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