Fatigue life of piezoelectric ceramics and evaluation of internal damage

被引：9

作者：

Mizuno, Mamoru ^{[1
]}

Enomoto, Yuta ^{[2
]}

Okayasu, Mitsuhiro ^{[1
]}

机构：

[1] Akita Prefectural Univ, 84-4 Ebinokuchi, Akita 0150055, Japan

[2] Undergrad student Akita Prefectural Univ, Akita, Japan

来源：

FATIGUE 2010 | 2010年 / 2卷 / 01期

关键词：

Piezoelectric ceramics; Fatigue life; Compression-compression fatigue test; Damage variable; Apparent density; Area fraction of cavities; Dependence on frequency;

D O I：

10.1016/j.proeng.2010.03.032

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Compression-compression fatigue tests were performed for PZT piezoelectric ceramics by using columnar specimens at various frequencies of cyclic loading. In fatigue tests, stress ratio was fixed to R=0.05, and maximum compressive stress was changed. A damage variable based on the continuum damage mechanics was evaluated by variation of apparent density of specimens. Moreover, area fraction of cavities on fracture surface was evaluated. As a result of experiments, the dependence of fatigue life on frequency of cyclic loading was clarified. It was also found that the damage variable is independent of the frequency, while the area fraction of cavities depends on the frequency. (C) 2010 Published by Elsevier Ltd.

引用

页码：291 / 297

页数：7

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