Large Deformation Analysis of Hyperelastic Continuum with Hexahedral Adaptive Finite Elements

Year 2023, Volume: 15 Issue: 4, 163 - 183, 24.12.2023

Mustafa Tekin , Bahadır Alyavuz

https://doi.org/10.24107/ijeas.1386832

Abstract

The use of hyperelastic materials capable of large deformations, such as elastomeric bearings used to reduce seismic effects, is quite common in civil engineering. Such environments are, in most cases, addressed by numerical solution techniques such as the finite element method. In case of large deformations, nonlinear analysis is used in the solution. In the study presented here, large deformations of a hyperelastic continuum expressed by the Mooney-Rivlin material model are calculated using hexahedral adaptive finite elements. A code was written in MATLAB using the total Lagrangian formulation for the nonlinear adaptive finite element solution. Comparisons were made with Abaqus software to check the consistency of the results obtained from this program. It has been observed that local refinements in the adaptive element mesh occur in the regions where they are needed. Considering the variation of maximum displacement and maximum stress with the number of elements, it has been observed that mesh refinement creates a convergent solution.

Keywords

Hyperelasticity, adaptive finite element method, hexahedral elements

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