The Strain Energy Release Rate for Stack of Coated Conductors with Interface Crack in Perpendicular Magnetic Field
( Fracture Mechanics - Properties, Patterns and Behaviours )
Publication series ： Fracture Mechanics - Properties, Patterns and Behaviours
Author： Meng Zhao Huadong Yong and Youhe Zhou
Publisher： IntechOpen
Publication year： 2016
E-ISBN: INT6160264006
P-ISBN(Paperback): 9789535127086
P-ISBN(Hardback): 9789535127093
Subject： TH Machinery and Instrument Industry
Keyword： Energy technology & engineering
Language： ENG
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The Strain Energy Release Rate for Stack of Coated Conductors with Interface Crack in Perpendicular Magnetic Field
Description
Due to the ability of transporting huge current in the stack of high-temperature superconducting conductors, the electromagnetic body force generated by the interaction of magnetic field and current may affect the mechanical stability of structure. In this paper, the fracture behavior of the stack of coated conductors which contains an interface crack is studied for increasing field and decreasing field. The body forces are obtained with variational formulation for the Bean’s critical state model. Based on the virtual crack closure technique (VCCT), the strain energy release rate of the stack of coated conductors with an interface crack is determined. The strain energy release rates are compared for different crack positions, crack lengths, magnetic fields and the thicknesses of substrate, respectively. These results may be useful for the practical application.
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