Experimental and Analytical Study of the Hyperelastic Behavior of the Hydrogel under Unconfined Compression
| Autor: | Hassan Mansour Raheem, A. M. Al-Mukhtar |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Ogden business.industry Yeoh Constitutive equation Strain energy density function Context (language use) 02 engineering and technology Structural engineering 021001 nanoscience & nanotechnology Viscoelasticity 020303 mechanical engineering & transports 0203 mechanical engineering Hyperelastic material Self-healing hydrogels 0210 nano-technology business Earth-Surface Processes |
| Zdroj: | Procedia Structural Integrity. 25:3-7 |
| ISSN: | 2452-3216 |
| DOI: | 10.1016/j.prostr.2020.04.002 |
| Popis: | Hydrogels have been studied for replacing the degenerative nucleus pulpousus (NP) due to their biocompatibilities and they resemble the viscoelastic properties of the native tissue. The mechanical behavior of these materials under unconfined compression that exhibited the non-linear behavior has not been intensively highlighted. The goal of this study is to utilize the strain energy density functions (SEDFs) to determine a suitable constitutive model that represents the nonlinear behavior of the hydrogels under unconfined compression test. In this context, hyperelastic models, such as Ogden, Neo-Hookean, Mooney-Rivlin and Yeoh models are selected to fit the experimental data for the hydrogels. The aim of using these models is also to predict the behavior of these materials out of range of the test (i.e. in tension). Therefore, FEA using ABAQUS/CAE is adopted to verify the hyperelastic models in compression and to validate the ability of the hyperelastic models of predicting the nonlinear behavior of the hydrogels in tension. The results showed that all hyperelastic models are fitted the experimental data and the predicted results by FEA agree with those of the test data. Ogden (N=1) model has well defined the nonlinear behavior of those types of material and was used in the FEA simulation. |
| Databáze: | OpenAIRE |
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