Interaction of collinear double cracks in superconductor slab with inclusions

Abstract

Abstract: A YBCO superconducting slab model with circular inclusion and longitudinal through collinear crack is established. Under the action of Lorentz force generated by external magnetic field, the interaction between two collinear cracks in YBCO superconductor with inclusion is studied, and the Bean model is used to describe the electromagnetic behavior of the superconductor. The stress intensity factor (SIF) at the crack tip is determined and the related magnetoelastic stress analysis is conducted. The results show that the size of external magnetic field, viscous magnetic flux flow velocity v₀, inclusion size, crack length, inclusion radius and the ratio of inclusion to matrix Young’s modulus all have an effect on the stress intensity factor.

Key words: collinear double crack, inclusion, stress intensity factor

CLC Number:

O346.1

ZHAO Yu-feng, XU Tao. Interaction of collinear double cracks in superconductor slab with inclusions[J]. Journal of Lanzhou University of Technology, 2022, 48(4): 163-167.

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