Crack problem for superconducting strip with finite thickness

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:51

Article

Yong, Hua-Dong¹  Jing, Ze¹  Zhou, You-He¹ 

[1] Lanzhou Univ, Coll Civil Engn & Mech, Minist Educ China,Dept Mech & Engn Sci, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Gansu, Peoples R China

关键词: Superconducting strip;    Inclined crack;    Variational inequality;    Stress intensity factor;   

DOI  :  10.1016/j.ijsolstr.2013.11.013

来源: Elsevier

【 摘 要 】

The inclined crack problems are considered for a thin strip and a strip with finite thickness in a perpendicular magnetic field. The critical current density is assumed to be a constant. The crack orientation is varied and the effect of crack on the magnetic field distribution is neglected. Based on the analytical results and variational inequality, the field and current distributions are computed for both thin strip and strip with finite thickness cases, respectively. Then, the stress intensity factors at the crack tip are determined using the finite element method for magnetic field loads. The numerical results are presented for different inclined crack angles, magnetization processes and geometry parameters of the strip. The results show that the fracture behavior of the strip with finite thickness is more complicated than that of the thin strip. With the numerical results, we can predict the largest possibility of cracking as the strip is in an external field. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

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