THE INFLUENCE OF MAXWELL STRESSES ON A MOVING CRACK IN PIEZOELECTRIC MATERIALS

摘要：

A plane problem of a moving crack with constant velocity in piezoelectric materials is investigated systematically.Based on the extended Stroh formalism,the closed-form expression of electric displacement in the moving crack,the electrostatic fields and dynamic stress and dynamic electric intensity factors are obtained in a concise form.The influence of Maxwell stresses and the speed of the crack is studied when the model bears combined mechanical and electrical loads at infinity.The electrically semi-permeable crack boundary condition is adopted.The effects of mediums inside the crack and surrounding the matrix at infinity are also analyzed theoretically.Numerical results are presented and it is found that the dynamic intensity factors are related not only to the electric field,but also to the velocity of the moving crack.

关键词： Maxwell stress Moving crack Crack velocity Plane problem

作者: Lu-qiao QI Yu-hao LI Cun-fa GAO

作者单位: State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R.China

会议类型: 国际会议

会议名称: The 2016 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2016全国压电和声波理论及器件技术研讨会)

会议地点: 西安

会议语种:英文

页码: 87-91

在线出版日期: 2016-10-21（万方平台首次上网日期，不代表论文的发表时间）