Quench characteristics and mechanical responses during quench propagation in rare earth barium copper oxide pancake coils  

作　　者：Mengdie NIU Jing XIA Huadong YONG Youhe ZHOU 

机构地区：[1]Key Laboratory of Mechanics on Disaster and Environment in Western China,The Ministry of Education of China,Lanzhou University,Lanzhou 730000,China [2]Department of Mechanics and Engineering Sciences,College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China [3]Institute of Applied Physics and Computational Mathematics,Beijing 100094,China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2021年第2期235-250,共16页应用数学和力学（英文版）

基　　金：the National Natural Science Foundation of China(Nos.11872195,11472120,and 11802036);the 111 Project(No.B14044)。

摘　　要：Quench and mechanical behaviors are critical issues in high temperature superconducting(HTS)coils.In this paper,the quench characteristics in the rare earth barium copper oxide(REBCO)pancake coil at 4.2K are analyzed,and a two-dimensional(2D)axisymmetric electro-magneto-thermal model is presented.The effects of the constituent materials,background field,and coil size are analyzed.An elastoplastic mechanical model is used to study the corresponding mechanical responses during the quench propagation.The variations of the temperature and strain in superconducting layers are compared.The results indicate that the radial strain evolutions can reflect the transverse quench propagation and the tensile hoop and radial stresses in superconducting layers increase with the quench propagation.The possible damages are discussed with the consideration of the effects of the background field and coil size.It is concluded that the high background field significantly increases the maximum tensile hoop and radial stresses in quenching coils and local damage may be caused.

关 键 词：rare earth barium copper oxide(REBCO)pancake coil hoop stress quench characteristic mechanical response radial stress 

分 类 号：O34[理学—固体力学]