Influence of mechanical stresses on partial discharge in a piezoelectric solid containing cavities

摘要：

For a piezoelectric solid with an air-filled elliptic cavity, the two-dimensional problems of partial discharge inside the cavity are studied when the solid is subjected to combined mechanical stress and electric field. Based on the law of Paschen, the influence of mechanical stress on partial discharge is discussed. It is shown from the obtained results that the applied mechanical stress can retard or enhance the occurrence of partial discharge, which is dependent on the signs of applied electric fields. It is also found that for a mathematical crack (with zero initial width), partial discharge may not happen even when the significantly high mechanical and electric loadings are applied within the range of practical interest.

关键词： Piezoelectric ceramics Crack Partial discharge Mechanical stress

作者: Cun-Fa Gao

作者单位: College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics.Nanjing 210016,China

会议类型: 国际会议

会议名称: The Eighth International Conference on Fundamentals of Fracture(ICFF VIII)(第八届断裂基础国际会议)

会议地点: 香港·广州

会议语种:英文

页码: 4920-4924

在线出版日期: 2008-01-03（万方平台首次上网日期，不代表论文的发表时间）