Element-Free Modelling of Topological Gels with Peculiar Multiaxial Large Deformation Behavior  

作　　者：D.M.Li Jia-Hui Liu Jia-Xuan Xie 

机构地区：[1]School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan,430070,China [2]School of Science,Wuhan University of Technology,Wuhan,430070,China

出　　处：《Acta Mechanica Solida Sinica》2022年第5期880-890,共11页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(12002247);the Natural Science Foundation of Hubei Province(2018CFB129);the Fundamental Research Funds for the Central Universities of China(WUT:2016IVA022 and WUT:2021IVB013).

摘　　要：With slidable cross-links along the polymer strands,topological gels can adjust their network topology in response to the imposed loads.As reported in experimental studies from the literature,the unique cross-linking strategy and the distinct deformation mechanism result in a peculiar multiaxial behavior with minimal strain-coupling between different principal directions at relatively low cross-linking concentrations.This paper presents an element-free modelling of the topological gels focusing on their nonlinear stress–strain behavior under general biaxial extension.Specifically,conditions of uniaxial stretching and the three types of biaxial deformation,i.e.,equibiaxial stretching,pure shear deformation,and“two-step”biaxial deformation are investigated.The numerical stress–strain curves for these conditions are compared against those from the literature.

关 键 词：Topological gel Multiaxial deformation Large deformation Element-free method HYPERELASTICITY 

分 类 号：TB301[一般工业技术—材料科学与工程]