Fracture criterion for conductive cracks in soda-lime glass under combined mechanical and electrical loading

被引:6
作者
Yan, Dong-Jun [1 ]
Huang, Hai-You [1 ]
Cheung, Chi-Wai [1 ]
Zhang, Tong-Yi [1 ]
机构
[1] Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China
关键词
Fracture; Soda-lime glass; Conductive cracks; Combined mechanical and electrical loading; Charge-free zone model; DEEP NOTCHES; PIEZOELECTRIC CERAMICS; FAILURE CRITERION; FERROELECTRIC CERAMICS; DIELECTRIC-BREAKDOWN; BEHAVIOR; DRIVEN; TOUGHNESS; FIELDS;
D O I
10.1007/s10704-010-9468-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Fracture tests of electrically conductive cracks on pre-notched four-point bending soda-lime glass samples were conducted under combined mechanical and electrical loading. The experimental results show that the critical stress intensity factor at fracture is reduced if an electric field is applied, thereby indicating that the electric field makes contributions to the fracture of conductive cracks. Base on the charge-free zone (CFZ) model, the total local J-integral including the local mechanical and electrical J-integrals serves as a fracture criterion for conductive cracks in dielectric ceramics under combined mechanical and electrical loading. The experimental results confirm the fracture criterion deduced from the CFZ model.
引用
收藏
页码:185 / 199
页数:15
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