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Fracture behavior of an inclined crack interacting with a circular inclusion in a high-TC
superconductor under an electromagnetic force
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A simple model is proposed to investigate the interaction problem for a circular nonsuperconducting inclusion embedded in a high-TCsuperconducting matrix which contains an inclined crack, oriented at an arbitrary angle from the direction of the critical currents. The electromagnetic behavior is described by the critical state, the original Bean model. The perturbation brought upon by the circular inclusion and the crack on the critical current density is assumed to be negligible and not considered in this model. The distribution dislocation technology is applied to formulate the current problem. The stress intensity factors (SIFs) are obtained by solving the formulated singular integral equations. The effects of the crack angle, the elastic modulus, the inclusion-crack distance and the inclusion-crack size on the stress intensity factors are discussed in detail.
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