Applicability of The Crack Face Electrical Boundary Conditions in Piezoelectric Mechanics

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• 作者：Baolin Wang ^A1 ; Jiecai Han ^A1 ; Shanyi Du ^A1
• 关键词：piezoelectric materials ; fracture ; notch ; boundary conditions
• 刊名：Acta Mechanica Solida Sinica
• 出版年：2004
• 出版时间：December 2004
• 年：2004
• 卷：17
• 期：4
• 页码：290-296
• 全文大小：147 KB
• 刊物类别：Engineering
• 刊物主题：Theoretical and Applied Mechanics
  Mechanics, Fluids and Thermodynamics
  Engineering Fluid Dynamics
  Numerical and Computational Methods in Engineering
  Chinese Library of Science
  
• 出版者：The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of
• ISSN：1614-3116

文摘

Abstract The electrical boundary conditions on the crack faces and their applicability in piezoelectric materials are discussed. A slit crack and a notch of finite thickness in piezoelectric materials subjected to combined mechanical and electrical loads is considered. Here, a crack is defined as a notch without thickness, which is filled with air or vacuum. The crack or notch is perpendicular to the poling direction of the medium. The ideal crack face electrical boundary conditions, i.e., the electrically permeable crack and the electrically impermeable crack, are investigated first. Then dependence of the field intensity factors on notch thickness at the notch tips is analyzed to obtain a closed-form. The results are compared with the ideal crack solutions. Some useful results are found.