DAI Yong1,2 LUO Ying2
(1. Suzhou High School of Jiangsu Province, Suzhou 215007; 2. Chinese Machinery Industry Key Laboratory for echanical Structure Damage Detection Technology, Jiangsu University, Zhenjiang 212013)
Abstract: The piezoceramics composite possesses wide application prospect for its specific electric-mechanical and designable properties and its characteristic of overcoming the brittleness that single piezoelectric ceramics material has. The structure principle of 1-3 mode orthotropic piezoelectric fiber composite (PFC) is proposed. By finite element modeling, the influences of the key dimensions of interdigital electrode and the diameter of piezoelectric fiber on its sensing property are analyzed. In addition, the orthotropic characteristic is verified through experiment. The results show that the sensor has obvious orthotropic characteristic and can distinguish stress wave from different directions. We also found that the sensor performance can be improved by reducing the fiber diameter and the center distance of the electrode.
Keywords: piezoceramics fiber composite material, finite element, performance, sensor property, orthotropic