Geometrical shape of in-plane inclusion characterized by polynomial internal stress field under uniform eigenstrains  

作　　者：Jian WU C.Q.RU Liang ZHANG Ling WAN 

机构地区：[1]College of Aerospace Engineering, Chongqing University [2]Department of Mechanical Engineering, University of Alberta [3]State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology

出　　处：《Applied Mathematics and Mechanics(English Edition)》2016年第9期1113-1130,共18页应用数学和力学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.11372363);the Fundamental Research Funds for the Central Universities of China(No.0241005202006);the Natural Science&Engineering Research Council of Canada;the Open Research Foundation of the State Key Laboratory of Structural Analysis for Industrial Equipment(No.GZ1404)

摘　　要：The internal stress field of an inhomogeneous or homogeneous inclusion in an infinite elastic plane under uniform stress-free eigenstrains is studied. The study is restricted to the inclusion shapes defined by the polynomial mapping functions mapping the exterior of the inclusion onto the exterior of a unit circle. The inclusion shapes, giving a polynomial internal stress field, are determined for three types of inclusions, i.e., an inhomogeneous inclusion with an elastic modulus different from the surrounding matrix, an inhomogeneous inclusion with the same shear modulus but a different Poisson＇s ratio from the surrounding matrix, and a homogeneous inclusion with the same elastic modulus as the surrounding matrix. Examples are presented, and several specific conclusions are achieved for the relation between the degree of the polynomial internal stress field and the degree of the mapping function defining the inclusion shape.The internal stress field of an inhomogeneous or homogeneous inclusion in an infinite elastic plane under uniform stress-free eigenstrains is studied. The study is restricted to the inclusion shapes defined by the polynomial mapping functions mapping the exterior of the inclusion onto the exterior of a unit circle. The inclusion shapes, giving a polynomial internal stress field, are determined for three types of inclusions, i.e., an inhomogeneous inclusion with an elastic modulus different from the surrounding matrix, an inhomogeneous inclusion with the same shear modulus but a different Poisson＇s ratio from the surrounding matrix, and a homogeneous inclusion with the same elastic modulus as the surrounding matrix. Examples are presented, and several specific conclusions are achieved for the relation between the degree of the polynomial internal stress field and the degree of the mapping function defining the inclusion shape.

关 键 词：inclusion shape internal stress field EIGENSTRAIN POLYNOMIAL 

分 类 号：O344.1[理学—固体力学]