抄録
In this study, we investigate the large deformation analysis of a nonreciprocal gel under cylindrical indentation. The nonreciprocity of the gel is modeled by extending the framework of anisotropic linear elasticity [Wang et al., 2023. Mechanical nonreciprocity in a uniform composite material. Science 380, 192–198]. Plane-strain finite-element analysis is performed by assuming the frictionless between the gel and the rigid indenter, leading to reproducing the asymmetric response of the nonreciprocal gel. It is found that severe large deformations cause non-convergence of incremental calculations, which is resolved by introducing artificial viscosity and hourglass control. The combination prevents the occurrence of hourglass deformation modes around the area directly below the indenter as well as obtains converged solutions in efficient incremental calculations. The use of larger values of the two parameters causes the increase of computational efficiency and the decrease of computational accuracy. Parametric studies elucidate the existence of the proper region of the two parameters.
Nonreciprocal gel, Tension compression asymmetry, Large deformations, FEA
