光学精密工程2013，Vol.21Issue(4)：941-947,7.DOI:10.3788/OPE.20132104.0941
共振型气体泵用压电振子的疲劳寿命
Fatigue life of piezoelectric actuator used in resonance-type air pump
摘要
Abstract
As the fatigue life of a piezoelectric actuator is relative to the service life of a piezoelectric pump, this paper carries out a fatigue life-related research. First, times of stress cycle corresponding to the ultimate stress is experimentally acquired when Pb(Zr,Ti)O3 (PZT-5)ceramics suffers from the fatigue failure under an electro-mechanical coupling field. The number of samples selected at different levels of stress in the above experiment are discriminated and corrected by using the coefficient of variation. After data processing, a p-S-N double logarithm curve and its linear regression equation are obtained with the safety life at different levels of stress under conditions of 95% degree of confidence and 99. 9% livability calculated respectively, which offers important and necessary data for the fatigue life calculation of piezoelectric actuator. Finally, the fatigue life of the piezoelectric actuator of a certain resonance-type air pump is calculated to be 4461 h with safety factor 1. 25 by using ansys and hypothesis of fatigue damage accumulation. These results perfect the technical parameters of this air pump and the fatigue data, and the calculation method can be applied to the fatigue calculation of PZT-5 actuator in other kinds of piezoelectric pumps.关键词
共振型气体压电泵/压电振子/锆钛酸铅陶瓷/p-S-N曲线/疲劳寿命Key words
resonance-type piezoelectric air pump/ piezoelectric actuator/ PZT ceramics/ p-S-N curve/fatigue life分类
机械制造引用本文复制引用
刘焱,接勐,谢海峰,杨志刚..共振型气体泵用压电振子的疲劳寿命[J].光学精密工程,2013,21(4):941-947,7.基金项目
国家自然科学基金资助项目(No.51175213) （No.51175213）
常州市应用基础研究计划资助项目(No.CJ20115014) （No.CJ20115014）
