压电材料裂纹和缺口尖端的应力场数值研究  

Stress Fields and Singularities at Notch and Crack Tips of Piezoelectric Materials

作　　者：杨庆生[1] 冯思伟[1] 谭祥军[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100022

出　　处：《北京工业大学学报》2006年第S1期41-45,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金(10272006;30470439);北京市优秀人才专项资助(20041A0501517)

摘　　要：利用力-电耦合有限元法对压电材料裂纹和缺口尖端的应力场分布、不同电压和不同缺口角度对尖端应力分布和奇异性的影响进行了研究．研究表明,缺口角度仅影响尖端应力的奇异性,对应力分布的影响很小;在压电材料中,电压引起的应力很小,呈振荡性分布．The present paper investigated the stress distribution at notch and crack tips of piezoelectric materials by coupled electric and elastic FE method. The singularities of the stress at the tips are emphasized for different notch angles and different electric strengths. The numerical results show that the notch angle can affect obviously the singularities of the stress and slightly the stress level in the front of the tips. The electric field induces oscillation of the stress, but the stress has relatively sm...

关 键 词：压电材料 缺口 裂纹 应力奇异性 有限元 

分 类 号：TB34[一般工业技术—材料科学与工程]