压电材料平面电渗透裂纹的机电耦合场  

Plane Coupled Solution For Piezoelectric Media With Electrically Permeable Crack

作　　者：刘新民[1] 

机构地区：[1]燕山大学土木工程与力学系,秦皇岛066004

出　　处：《燕山大学学报》2000年第1期8-11,共4页Journal of Yanshan University

摘　　要：用复变函数方法，结合椭圆形夹杂内的电场强度和电位移为常量这一早期研究结果，研究了压电材料平面电渗透裂纹的机电耦合场及其奇异性。解答表明，切向电场强度和法向电位移在裂纹尖端有由机械载荷引起的奇异，而与电载荷无关：应力强度因子与纯弹性材料结果一致。Machinery-electric coupling field and its singularity of electrically permeable cracks for piezoelcetric materials are stu- died using complex function method and considering electric field strength and electric displacement inside elliptical inclusion as constants, namely early research results, for the failure or unsta- bility of piezoelectric devices caused by material defects. It is shown from the solution that electric field strength and electric displacement have (1/2) types of singularity at the crack tip for the electrically permeable slit crack, and depend only on machine loads. The stress intensity factors are identical to the results of the problem elastic.

关 键 词：压电介质 裂纹 强度因子 耦合场 传感器 

分 类 号：TP212.04[自动化与计算机技术—检测技术与自动化装置]