Abstract
A model of debonding and crack occurring from a circular rigid inclusion in an infinite plate is analyzed under the loading condition of the inclusion rotation. A mapping function of a sum of fractional expressions and complex stress functions are used for the analysis of the mixed boundary value problem of the plane elasticity. The following values are obtained: values of stress singularity at the debonded tip where only a debonding exists i.e. without a crack; stress intensity factors just after the occurrence of a crack; and the energy release rates for the debonding propagation and the crack occurrence. Furthermore we discuss which phenomenon occurs, the debonding propagation or the crack occurrence at the debonded tip. We also discuss from which tip the debonding propagation occurs.
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