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 ...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.展开更多
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).
文摘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.
