By using the finite-part integral concepts and limit technique,the hypersingular inte-grodifferential equations of three-dimensional(3D)planar interface crack were obtained;then thedominant-part analysis of 2D hypersingular integral was further used to investigate the stress fieldsnear the crack front theoretically,and the accurate formulae were obtained for the singular stress fieldsand the complex stress intensity factors.After that,a numerical method is proposed to solve the hyper-singular integrodifferential equations of 3D planar interface crack,and the problem of elliptical planarcrack is then considered to show the application of the method.The numerical results obtained are sat-isfactory.
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