三维压电陶瓷的断裂  

FRACTURE MECHANICS FOR THREE DIMENSIONAL PIEZOELECTRIC CERAMICS

作　　者：赵明皞[1] 沈亚鹏[1] 刘国宁[1] 刘元杰[1] 魏香玲 

机构地区：[1]郑州机械研究所先进制造技术研究中心

出　　处：《机械强度》1999年第1期58-60,共3页Journal of Mechanical Strength

基　　金：国家自然科学基金

摘　　要：基于三维压电陶瓷中的一般平片裂纹前沿的位移、应力和应力强度因子的表达式［１８，１９］，求得局部机械能释放率，以此建立了压电陶瓷的断裂准则。作为特例，将此准则应用于二维问题，所得结果与已有结果基本一致。In this paper , the local energy release rates are obtained for a planar crack in three dimensional transversely isotropic piezoelectric media by making use of the displacements, stresses and stress intensity factors near the crack front. The corresponding fracture criterion is established. Applying this criterion to a two dimensional problem, the critical stress is expressed in terms of the electric load, which agrees roughly with the reported results.

关 键 词：压电陶瓷 断裂力学 断裂准则 三维压电陶瓷 

分 类 号：TM282.014[一般工业技术—材料科学与工程] O346.1[电气工程—电工理论与新技术]