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Accurate viscoelastic large deformation analysis using F-bar aided edge-based smoothed finite element method for 4-node tetrahedral meshes (F-barES-FEM-T4)
Last modified: 2017-05-14
Abstract
A state-of-the-art tetrahedral smoothed finite element method, F-barES-FEM-T4, is demonstrated on viscoelastic large deformation problems.
The stress relaxation of viscoelastic materials brings near incompressibility when the long-term Poisson's ratio is close to 0.5.
The conventional hybrid 4-node tetrahedral (T4) elements cannot avoid the shear locking and pressure checkerboarding issues due to the incompressibility, meanwhile F-barES-FEM-T4 can suppress these issues successfully.
A few examples of analyses verify that F-barES-FEM-T4 is locking-free and pressure oscillation-free in viscoelastic analyses as well as in nearly incompressible hyperelastic or elastoplastic analyses.
The stress relaxation of viscoelastic materials brings near incompressibility when the long-term Poisson's ratio is close to 0.5.
The conventional hybrid 4-node tetrahedral (T4) elements cannot avoid the shear locking and pressure checkerboarding issues due to the incompressibility, meanwhile F-barES-FEM-T4 can suppress these issues successfully.
A few examples of analyses verify that F-barES-FEM-T4 is locking-free and pressure oscillation-free in viscoelastic analyses as well as in nearly incompressible hyperelastic or elastoplastic analyses.
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