Modeling effects of gas bubbles on the mechanical behaviors of Ag/Bi-2212 round wires using a double cantilever beam bridge model

被引：6
作者：
Lu, Yurong [1 ,2 ]
Wang, Zhongtong [3 ]
Yong, Huadong [1 ,2 ]
Zhou, Youhe [1 ,2 ]
机构：
[1] Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Gansu, Peoples R China
[2] Lanzhou Univ, Coll Civil Engn & Mech, Dept Mech & Engn Sci, Lanzhou 730000, Gansu, Peoples R China
[3] Xi An Jiao Tong Univ, Sch Aerosp Engn, Dept Engn Mech, Xian 710049, Peoples R China
来源：
CRYOGENICS | 2016年 / 77卷
基金：
中国国家自然科学基金;
关键词：
Bi2212; wire; Gas bubble; Mechanical behavior; PINNING-INDUCED STRESS; TRAPPED-FIELD; POWDER; MAGNETOSTRICTION; SUPERCONDUCTORS; STATE; FABRICATION; GENERATION; DENSITY; STRAIN;
D O I：
10.1016/j.cryogenics.2016.05.003
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Due to the larger current-carrying property, Bi2Sr2CaCu2Ox, (Bi2212) superconductors have a great potential application in high field magnet. Bi2212 superconducting material can be fabricated as an isotropic round wire. However, there is 30% void space in the wire, such as gas bubbles. The void space has a larger influence on the property of the wire. In this paper, we will study the effect of gas bubble on the fracture behavior. Based on the double cantilever beam model and critical state theory, the mechanical behavior of Bi2212 wire is studied for decreasing field. Two different damage mechanisms are discussed using the strain energy release rate and strain of bridge. The results show that the large gas bubble can increase the strain of bridge. The central filaments with gas bubble are easier to be damaged than the edge filaments with gas bubble. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：65 / 73
页数：9
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