Abstract
Abstract The method (W.D. Collins, Proc. R. Soc. London A274, 507–528 (1963); W.S. Fu and L.M. Keer, Int. J. Eng. Sci. 7, 361–372 (1969) [1,2]) used to solve co-planar penny-shaped cracks is generalized to investigate interaction of arbitrarily located penny-shaped cracks. The solution (M.K. Kassir and G.C. Sih, Three-dimensional Crack Problems (Noordhoff International, 1975) [3]) for the problem of an isolated crack in an infinite solid is applied together with the superposition principle to reduce the problem to a system of Fredholm integral equations of the second kind. These integral equations are then solved iteratively when the cracks are far apart. Some asymptotic solutions for the stress intensity factors are presented and comparisons are made whenever possible. Numerical solutions reveal some interesting phenomena.
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