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功能梯度压电材料反平面断裂问题研究
引用本文:胡克强,仲政,金波.功能梯度压电材料反平面断裂问题研究[J].强度与环境,2001,1(4):29-37.
作者姓名:胡克强  仲政  金波
作者单位:同济大学固体力学国家重点实验室,同济大学固体力学国家重点实验室,同济大学固体力学国家重点实验室 上海,200092,上海,200092,上海,200092
摘    要:基于三维弹性理论和压电理论,导出了材料系统在横观各向同性平面内梯度分布的压电体的状态方程;进而对材料系数按指数函数规律分布的半无限大压电体中的反平面裂纹问题进行了求解;利用Fourier变换给出了半无限大压电体中位移、应力的形式解;并求得了裂纹尖端的应力强度因子及电位移强度因子,分析了不同材料系数及几何因素对它们的影响。

关 键 词:功能梯度材料  压电材料  应力强度因子  电位移强度因子  反平面断裂
文章编号:1006-3919(2001)04-0029-09
修稿时间:2001年4月11日

Anti-plane Fractrue Problem in Functionally Graded Piezoelectric Materials
HU Ke qing,ZHONG Zheng JIN Bo.Anti-plane Fractrue Problem in Functionally Graded Piezoelectric Materials[J].Structure & Environment Engineering,2001,1(4):29-37.
Authors:HU Ke qing  ZHONG Zheng JIN Bo
Abstract:Based on the three dimensional theory of piezoeletric elasticity,the governing equations is deduced for the functionally graded piezoeletric materials,and the anti plane fractrue problems for half infinite piezoelectric medium is solved in the case of the material quality being in the form of exponential functions.We get the displacement and stress around the ccrack in the half infinity piezoeletrical medium by the way of Fourier transformation ,and then the stress intensity factor(SIF) and the electric displacement intensity factor(EDIF) near the crack tip are easily obtained.Finally,the influence of different material quality and geometrical size on SIF and EDIF is analyzed.
Keywords:Functionally graded piezoeletric materials  Piezoeletric material  Stress intensity factor  eletric displacement intensity factor
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