压电智能结构疲劳裂纹扩展试验研究  

An Experimental Study on Fatigue Crack Growth of the Piezoelectric Smart Structure

作　　者：华利民[1] 程站起[2] 卫兴[3] 

机构地区：[1]郑州大学远程教育学院,郑州450001 [2]郑州大学土木工程学院,郑州450001 [3]河南公安高等专科学校,郑州450011

出　　处：《河南科学》2007年第6期1014-1015,共2页Henan Science

基　　金：国家自然科学基金资助项目(10072041)

摘　　要：在结构表层铺设压电元件,利用压电元件能够实现力学量和电学量之间相互转化的独特性能,可将其用作传感器和驱动器,赋予材料和结构智能的能力.采用PSN-1型压电材料作为驱动器,基体材料为镁合金,与外部电源结合构成了智能结构系统.对这一系统进行了疲劳裂纹扩展试验研究,并将智能结构试验结果与常规结构试验结果相比较,试验结果证明压电激励对结构的疲劳裂纹扩展速率有一定的影响.Piezoelectric material has the ability to convert mechanical energy into electric energy and vice versa, based on this function, the piezoelectric elements can be used as sensors and actuators in smart materials and structures. In this paper, by embedding PSN-1 piezoelectric ceramics into the surface of the magnesium incorporated with the external power supply, an experimental system of the smart structure was constructed. The behavior of fatigue crack growth for the smart structure was experimental investigated, and the results of the smart structure was compared with those of the ordinary structure. The test results show that piezoelectric actuation has a considerate effect on the fatigue crack growth rate of the structure.

关 键 词：压电 疲劳裂纹扩展 智能结构 

分 类 号：O344.3[理学—固体力学]