Electrical failure of piezoelectric ceramics with a conductive crack under electric fields

被引：18
|
作者：
Beom, H. G. [1 ]
Jeong, K. M. [2 ]
Park, J. Y. [2 ]
Lin, S. [1 ]
Kim, G. H. [1 ]
机构：
[1] Inha Univ, Dept Mech Engn, Inchon 402751, South Korea
[2] Kumho Tires Co Inc, R&D Ctr, Kwangju 506711, South Korea
来源：
ENGINEERING FRACTURE MECHANICS | 2009年 / 76卷 / 15期
关键词：
Piezoelectric ceramics; Conducting crack; Dielectric breakdown; J integral; Finite element analysis; FERROELECTRIC CERAMICS; DEEP NOTCHES; FRACTURE; ACTUATORS; CRITERION; MECHANICS; BEHAVIOR;
D O I：
10.1016/j.engfracmech.2009.08.004
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The failure behavior of piezoelectric ceramics with a conductive crack under purely electric loading is investigated. Electrical fracture tests are conducted to study the influence of the directions of poling and electric loading. Two failure modes of piezoelectric materials are observed: fracture that is accompanied with dielectric discharging and the formation of tubular channels without fracture. The critical J integrals at the onset of both fracture and breakdown are calculated numerically via finite element analysis. The effects of both the direction of the electric field and the poling direction on both fracture and breakdown resistance are discussed. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2399 / 2407
页数：9
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