An Analysis of the T-Shaped Crack Along the Fiber-Matrix Interface in Unidirectional Composite Materials

概要

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A fracture problem in unidirectionally fiber-reinforced composites containing a T-shaped crack at the interface is considered. The T-shaped crack consists of an interface crack and a crack perpendicular to the interface. A system of integral equations is formulated based on the two-dimensional elasticity and Fourier transforms. The integral equations are evaluated by a numerical method using only the Gauss-Chebyshev integral formula, which was developed by the present authors in the last paper. First, the numerical results are compared with the previous results for a T-shaped crack in a homogeneous material, verifying the present method to be highly satisfactory. Next, three kinds of stress intensity factors ( SIFs), such as Model SIF of a perpendicular crack and Mode I and II SIFs of an interface crack, are presented for glass/epoxy, carbon/epoxy and tungsten /epoxy and tungsten/copper composite systems with various geometrical parameters.
一般社団法人日本機械学会の論文
1988-10-15