含界面裂纹压电体界面上作用位错和集中载荷的基本解

Basic Solution for Interfacial Crack Acted by Interfacial Dislocation and Concentrated Force in Piezoelectric Bimaterial

研究了压电体双材料界面上的裂纹与位错、集中载荷的相互作用 ,得到了问题的闭合解 ,包括应力 -电位移场、裂纹张开位移和电势差 .结果表明 ,在界面上的位错和集中载荷作用下的压电体双材料界面上的裂纹裂尖近区仍具有 r-1 / 2 + iε的振荡奇异性 。

The interaction between crack and dislocation or concentrated force on interface of piezoelectric bimaterial was discussed. Closed form solution,including stress,electric displacement,crack opening dis- placement and jump of electric potential,was obtained.It is shown thatwhen there are interfacial disloca- tion and concentrated force the interfacial crack gives a r- 1/ 2 +iεoscillatory singularity of the stress- electric- displacement fields around crack tips.The stress intensity factor and the explicit expressions of weight function for concentrated force were obtained.