A MAGNETO-MECHANICAL FULLY COUPLED MODEL FOR GIANT MAGNETOSTRICTION IN HIGH TEMPERATURE SUPERCONDUCTOR

被引：6

作者：

Gao, Zhiwen ^{[1
]}

Zhou, Youhe ^{[1
]}

机构：

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

来源：

ACTA MECHANICA SOLIDA SINICA | 2015年 / 28卷 / 04期

基金：

中国国家自然科学基金;

关键词：

high temperature superconductor (HTS); giant magnetostriction; magnetization; magneto-mechanical couple; alternating magnetic field; PINNING-INDUCED STRESS; CRITICAL-STATE; TRAPPED-FIELD; STRAIN;

D O I：

10.1016/S0894-9166(15)30021-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents a fully coupled model to account for the flux pinning induced giant magnetostriction in type-II superconductors under alternating magnetic field The superconductor E-J constitutive law is characterized by power law where the critical current density is assumed to depend exponentially on the flux density. The governing equations of the two-field problem (i.e., the interactions of elastic and magnetic effects) are formulated in a two-dimensional model. The magnetostriction curves and magnetization loops are calculated over a wide range of parameters. The effects of applied magnetic field frequency f and amplitude B-0 and critical current density on magnetostriction and magnetization are discussed. Results show that the critical current density of high temperature superconductor (HTS) YBCO has a significant effect on the magnetization and magnetostriction. The pinning-induced magnetostriction which has been observed in experiment can be qualitatively simulated by this model.

引用

页码：353 / 359

页数：7

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