Stress distribution in a flat superconducting strip with transport current.

The stress and magnetostriction induced by flux pinning for a flat superconducting strip of a type II superconductor are calculated analytically in the presence of transport current. The plane stress approach is used to find the exact solutions. By assuming that the current density is magnetic field independent, the body force and normal stress distributions for increasing and decreasing transport currents are given. In addition, the pinning induced magnetostriction is calculated. The results show that, during the transport current reduction, tensile stress may occur. It is worth pointing out that, in the flat superconducting strip with transport current, the stresses are mainly negative. The hysteresis loop of the magnetostriction cannot be observed for the full cycle of the transport current. [ABSTRACT FROM AUTHOR]