Abstract
A general solution is obtained to the two-dimensional problem of the interaction between a main crack and an arbitrarily located and oriented elliptical hole near its tip under mode I and mode II loading conditions. The analysis is based on the complex potentials of Muskhelishvili and an appropriate superposition procedure. The stress-intensity factor at the main crack is obtained in a general series form and approximate closed-form solutions are also derived using a perturbation procedure. The present solutions are verified by comparison with existing ones for special cases. Numerical examples are provided to show the effect of geometry, location and orientation of the microdefect on the stress-intensity factor of the main crack. Shielding and amplification effects resulting from the presence of the microdefect have also been examined.
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