利用压电补片修补裂纹板的效能分析  

Repair efficiency of cracked panel repaired by a piezoelectric patch

作　　者：严波[1] 刘成[1] 柳军[1] 赵莉[1] 

机构地区：[1]重庆大学资源与环境科学学院,重庆400030

出　　处：《重庆大学学报（自然科学版）》2009年第8期950-954,共5页Journal of Chongqing University

基　　金：中国博士后科学基金资助项目(2004036145);教育部留学回国人员基金资助项目

摘　　要：采用有限元方法分析多层压电补片修补裂纹板的应力强度因子,研究压电补片的电压、压电片层数、几何尺寸等参数对裂纹板应力强度因子的影响,并据此评价采用压电补片修补中心裂纹板后的修补效能。结果表明,利用压电补片修补后的裂纹板,其裂纹尖端的应力强度因子显著降低。适当增大电压可以获得理想的修补效果,但过高的电压可能不利;在电压相同和补片厚度一定的条件下,增多补片的压电片层数有利于提高修补效能;在一定范围内增大补片的几何尺寸也可提高修补效能,但尺寸超过一定限度后继续增大,对修补效能的进一步提高效果甚微。Using the finite element method, the stress intensity factor （SIF） of the cracked penal repaired with a multi-layered piezoelectric patch is studied. The effects of the parameters, including the voltage applied on the patch, the piezoelectric patch layer and the geometric size of the patch, on the SIF are numerically investigated, based on which the repair efficiencies in different repair parameters are assessed. Based on the results of the numerical models, that the SIF of the cracked panel repaired with a piezoelectric patch is attenuated greatly. Better repair efficiency is obtained with the increase of voltage, but too higher voltage may be unbeneficial. It is beneficial to use more layers in the piezoelectric patch as the thickness of the patch is fixed. The SIF of the repaired cracked panel decreases with the increase of the size of the patch, however, too large patch may not be helpful to elevate the repair efficiency.

关 键 词：裂纹板 主动修补 压电补片 应力强度因子 修补效能 

分 类 号：O346.1[理学—固体力学]