A novel modeling to predict the critical current behavior of Nb3Sn PIT strand under transverse load based on a scaling law and Finite Element Analysis

摘要: Abstract Superconducting Nb 3 Sn Powder-In-Tube (PIT) strands could be used for the superconducting magnets of next generation Large Hadron Collider. The are cabled into typical flat Rutherford cable configuration. During assembly a magnet and its operation experience not only longitudinal but also transverse load due to pre-compression applied during Lorentz felt when energized. To properly design guarantee their safe operation, mechanical effects on strand properties studied extensively; particularly, many scaling laws based tensile experiments have been established predict critical current dependence strain. However, has extensively so far. One reasons is that loading difficult conduct small diameter (about 1 mm) data currently available do follow common measurement standard making comparison between different sets difficult. Recently at University Geneva, new device developed characterize under loads. In this work we present 2D Finite Element Analysis (FEA) electro-mechanical response PIT was tested Geneva applied. FEA provides strain map filaments Those maps then evaluate behavior using recently law correlates wire with invariants superconductor. benefits limitations method discussed simulation results obtained filament experimental strands.