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Keynote: F-bar aided edge-based smoothed finite element methods with 4-node tetrahedral elements for static large deformation hyperelastic and elastoplastic problems
Last modified: 2016-06-04
Abstract
A new type of smoothed finite element method, F-barES-FEM-T4, is demonstrated in static large deformation hyperelastic and elastoplastic cases.
F-barES-FEM-T4 combines NS-FEM-T4 and ES-FEM-T4 with the aid of F-bar method in order to resolve all the major issues of Selective ES/NS-FEM-T4: limitation of material models, pressure oscillation, and corner locking.
As well as other S-FEMs, F-barES-FEM-T4 inherits displacement-based formulation and thus has no increase in DOF.
Moreover, the cyclic smoothing procedure introduced in F-barES-FEM-T4 is effective to adjust the smoothing level so that pressure oscillation is suppressed reasonably.
A few examples of analyses for rubber-like hyperelastic and elastoplastic materials proof the excellent performance of F-barES-FEM-T4 in contrast to the conventional hybrid elements.
F-barES-FEM-T4 combines NS-FEM-T4 and ES-FEM-T4 with the aid of F-bar method in order to resolve all the major issues of Selective ES/NS-FEM-T4: limitation of material models, pressure oscillation, and corner locking.
As well as other S-FEMs, F-barES-FEM-T4 inherits displacement-based formulation and thus has no increase in DOF.
Moreover, the cyclic smoothing procedure introduced in F-barES-FEM-T4 is effective to adjust the smoothing level so that pressure oscillation is suppressed reasonably.
A few examples of analyses for rubber-like hyperelastic and elastoplastic materials proof the excellent performance of F-barES-FEM-T4 in contrast to the conventional hybrid elements.
Keywords
simulation; numerical methods
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