ACOUSTIC EMISSION SIGNAL RESPONSE OF PIEZOELECTRIC FIBER COMPOSITES
作者单位：Shandong Provincial Key Lab.of Preparation and Measurement of Building MaterialsUniversity of Jinan Department of Qualify AssuranceFaw Jiefang Qingdao Automobile Co.Ltd.
会议名称：《2015全国压电和声波理论及器件技术研讨会》
会议日期：2015年
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：financially supported by the National Natural Science Foundation(Grants Nos.51172097) National High Technology Research and Development Program("863 Program",2015AA034701) A Project of Shandong Provincial Natural Science Foundation(Grants Nos.ZR2014EMP002)
关 键 词：Piezoelectric fiber Acoustic emission Orthotropic property Signal response Linear localization
摘 要：Piezoelectric fiber composites（PFCs）were fabricated by cutting-filling methods to be used as acoustic emission（AE）*** AE sources were simulated by pencil lead broken,the AE signals were collected in the test plate and the linear localization of sound source was measured based on acoustic emission *** results showed that the obtained AE signal amplitudes and voltages of PFCs exhibited dependence on the measuring distances and *** AE signal amplitudes were different in the orthogonal direction which indicated that the PFCs exhibited well orthotropic *** attenuation curves showed that the trend of signal attenuation gradually slowed down as the distance *** lead broken signals were acquired by the sensors for each time and the accuracy of linear positioning was above a percentage of 95,which indicated that the PFCs possessed good sensitivity and good signal responses to achieve the purpose of positioning and had high accuracy in the process of linear localization.