Large deformation and wrinkling analyses of bimodular structures and membranes based on a peridynamic computational framework  

作　　者：H.Li Y.G.Zheng Y.X.Zhang H.F.Ye H.W.Zhang 

机构地区：[1]Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu 610200,China [2]International Research Center for Computational Mechanics,State Key Laboratory of Structural Analysis for Industrial Equipment,Department of Engineering Mechanics,Faculty of Vehicle Engineering and Mechanics,Dalian University of Technology,Dalian 116024,China

出　　处：《Acta Mechanica Sinica》2019年第6期1226-1240,共15页力学学报（英文版）

基　　金：The work was supported by the National Natural Science Foundation of China(Grants 11672062,11772082,and 11672063);the 111 Project(Grant B08014);the Fundamental Research Funds for the Central Universities.

摘　　要：In this paper,the quasi-static large deformation,wrinkling and fracture behaviors of bimodular structures and membranes are studied with an implicit bond-based peridynamic computational framework.Firstly,the constant and tangential stiffness matrices of the implicit peridynamic formulations for the nonlinear problems are derived,respectively.The former is con structed from the linearization of the bond strain on the basis of the geometric approximation while the latter is established according to the linearization of the pairwise force by using first-order Taylor’s expansion.Then,a bimodular material model in peridynamics is developed,in which the tensile or compressive behavior of the material at each point is conveniently described by the tensile or compressive states of the bonds in its neighborhood.Moreover,the bimodular material model is extended to deal with the wrinkling and fracture problems of membranes by setting the compressive micro-modulus to be zero.In addition,the incremental-iterative algorithm is adopted to obtain the convergent solutions of the nonlinear problems.Finally,several representative numerical examples are presented and the results demonstrate the accuracy and efficiency of the proposed method for the large deformation,wrinkling and fracture analyses of bimodular structures and membranes.

关 键 词：Bimodular structures Wrinkling membranes Fracture problems PERIDYNAMICS Implicit numerical algorithm 

分 类 号：O34[理学—固体力学]