湖南大学学报（自然科学版）2012，Vol.39Issue(4)：31-36,6.
压电螺型位错与含界面效应纳米夹杂干涉研究
Interaction between a Screw Dislocation and a Nanoscale Inhomogeneity with Interface Effects
摘要
Abstract
The interaction of a piezoelectric screw dislocation in the matrix with interface effects under remote anti-plane shear stresses and in-plane electric loads in transversely isotropic piezoelectric solids was investigated. By using the complex variable method, the general solutions to the problem were given. With the aid of the Peach-Koehler formula, the explicit expressions of the image force acting on the screw dislocations were given. The results have indicated that the influence of the interface stress on the motion and the equilibrium of the dislocation near the inhomogeneity become significant when the radius of the inhomogeneity is reduced to nanometer scale. If the dislocation is located in the matrix, the positive interface effects can repel it. The soft inhomogeneity can also repel the screw dislocation near the inhomogeneity when the positive interface effect is considered.关键词
压电材料/螺形位错/界面应力/复势函数方法/位错力Key words
piezoelectric material/ screw dislocation/ interface stress/ complex variable method/image force分类
数理科学引用本文复制引用
方棋洪,许维,冯慧,刘又文..压电螺型位错与含界面效应纳米夹杂干涉研究[J].湖南大学学报（自然科学版）,2012,39(4):31-36,6.基金项目
国家重点实验室自主课题(60870005) （60870005）
国家自然科学基金资助项目(50801025,10872065,11172094) （50801025,10872065,11172094）
