Modelling brain tissue elasticity with the Ogden model and an alternative family of constitutive models
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910523040202752 |
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| author | Anssari-Benam, Afshin Destrade, Michel Saccomandi, Giuseppe |
| author_facet | Anssari-Benam, Afshin Destrade, Michel Saccomandi, Giuseppe |
| contents | The Ogden model is often considered as a standard model in the literature for application to the deformation of brain tissue. Here we show that, in some of those applications, the use of the Ogden model leads to non-convexity of the strain-energy function and mis-prediction of the correct concavity of the experimental stress-stretch curves over a range of the deformation domain. By contrast, we propose a family of models which provides a favourable fit to the considered datasets while remaining free from the highlighted shortcomings of the Ogden model. While, as we discuss, those shortcomings might be due to the artefacts of the testing protocols, the proposed family of models proves impervious to such artefacts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_08372 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Modelling brain tissue elasticity with the Ogden model and an alternative family of constitutive models Anssari-Benam, Afshin Destrade, Michel Saccomandi, Giuseppe Soft Condensed Matter Materials Science The Ogden model is often considered as a standard model in the literature for application to the deformation of brain tissue. Here we show that, in some of those applications, the use of the Ogden model leads to non-convexity of the strain-energy function and mis-prediction of the correct concavity of the experimental stress-stretch curves over a range of the deformation domain. By contrast, we propose a family of models which provides a favourable fit to the considered datasets while remaining free from the highlighted shortcomings of the Ogden model. While, as we discuss, those shortcomings might be due to the artefacts of the testing protocols, the proposed family of models proves impervious to such artefacts. |
| title | Modelling brain tissue elasticity with the Ogden model and an alternative family of constitutive models |
| topic | Soft Condensed Matter Materials Science |
| url | https://arxiv.org/abs/2407.08372 |