Modelling brain tissue elasticity with the Ogden model and an alternative family of constitutive models.
Anssari-Benam, Afshin Destrade, Michel Saccomandi, Giuseppe
Anssari-Benam, Afshin
Destrade, Michel
Saccomandi, Giuseppe
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Publication Date
2022-08-29
Type
Article
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Anssari-Benam, Afshin, Destrade, Michel, & Saccomandi, Giuseppe. (2022). Modelling brain tissue elasticity with the Ogden model and an alternative family of constitutive models<sup>†</sup>. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 380(2234), 20210325. doi:10.1098/rsta.2021.0325
Abstract
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 the 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.
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Publisher
The Royal Society
Publisher DOI
10.1098/rsta.2021.0325
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CC BY-NC-ND 3.0 IE