Electric-field-induced fatigue crack growth in ferroelectric ceramics

被引：20
|
作者：
Fang, D. N. [1 ,2 ]
Zhang, Y. H. [1 ]
Mao, G. Z. [1 ]
机构：
[1] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China
[2] Peking Univ, Coll Engn, LTCS, Beijing 100084, Peoples R China
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2010年 / 54卷 / 02期
关键词：
Ferroelectric material; Fatigue crack growth; Ceramics; LEAD-ZIRCONATE-TITANATE; PIEZOELECTRIC CERAMICS; FRACTURE-MECHANICS; BEHAVIOR; INITIATION; COMPOSITE; MODEL; PLZT;
D O I：
10.1016/j.tafmec.2010.10.004
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Electric-field-induced fatigue crack growth in pre-cracked PZT ferroelectric ceramics is experimentally investigated in this work. It is found that the crack open and close under an alternating electric field is a major mechanism of crack propagation. The experimental results also show that the frequency, waveform, as well as the amplitude ratio, of the electric loading, play important roles in electric-field-induced fatigue cracking. Empirical formulations of fatigue crack propagation rates are obtained based on the experimental results. It is revealed that the crack grows at a nearly constant rate when the loading frequency is below 100 Hz. However, with the increase of the loading frequency over 125 Hz, the crack propagation rate diminishes rapidly. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：98 / 104
页数：7
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