Investigating Modeling Approaches in Mechanical Analysis of HTS Tapes Using Open-Source FEM Library Sparselizard

Abstract

Coated conductors based on high temperature superconductors (HTS), such as rare-earth barium copper oxide tapes, are expected to enable future electromagnetic applications to reach magnetic fields beyond 20 T. Understanding their mechanical behavior is crucial, but choosing the right tools and modeling methods can be challenging. This work introduces a new open-source simulation tool that can be used to analyze the strain and stress in HTS tapes. The built-in structural elastic solver in this multiphysics C++ based finite element library is enhanced with a linear hardening elastoplastic method by us. It also offers flexibility for future expansion based on user needs. Detailed and homogenized HTS tape models are explored using the mechanical model with both elastic and elastoplastic analyses. By comparing different approaches, the optimal method can be identified for specific applications. We believe this methodology and tool have the potential for large-scale electromagnetic applications, for instance solenoids and magnets, with the ability to be tailored to specific requirements.