Semi-weight function method on computation of stress intensity factors in dissimilar materials |
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Authors: | Ma Kai-ping Liu Chun-tu |
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Institution: | Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P. R. China |
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Abstract: | Semi-weight function method is developed to solve the plane problem of two bonded dissimilar materials containing a crack
along the bond. From equilibrium equation, stress and strain relationship, conditions of continuity across interface and free
crack surface, the stress and displacement fields were obtained. The eigenvalue of these fields is lambda. Semi-weight functions
were obtained as virtual displacement and stress fields with eigenvalue-lambda. Integral expression of fracture parameters,
KI and KII, were obtained from reciprocal work theorem with semi-weight functions and approximate displacement and stress values on
any integral path around crack tip. The calculation results of applications show that the semi-weight function method is a
simple, convenient and high precision calculation method.
Foundation item: the National Natural Science Foundation of China (19872066)
Biography: MA Kai-ping (1974≈) |
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Keywords: | dissimilar material interface crack stress intensity factor semi-weight function method plane fracture problem |
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