Abstract
• The study of bending properties has important significance for nuclear fusion and superconducting magnets. • Laminated beam theory can accurately calculate strain distribution through finite element method (FEM) simulation. • A FEM simulation model is established to analyze the critical bending radius of Q-IS strand, and samples are made for testing. • According to the built model, the critical bending radius of Q-IS strand is simulated when bended along different angles. The study of the mechanical properties of superconducting strands plays a very important role in its application in engineering. In this paper, a 3D model based on laminate theory is proposed to study the bending properties of REBCO tape and quasi-isotropic superconducting (Q-IS) strand. Laminated beam theory can not only simplify REBCO tape and superconducting strand to qualitatively analyze strain distribution, but also accurately calculate strain distribution through finite element method (FEM) simulation. A FEM simulation model is established to analyze the critical bending radius of Q-IS strand, and samples are made for testing. According to the built model, the critical bending radius of Q-IS strand is simulated when bended along different angles. The study of bending properties has important significance for the application of superconducting strand in the applications of power transmission, nuclear fusion and superconducting magnets.
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