Dataset Information

Facile Analytical Extraction of the Hyperelastic Constants for the Two-Parameter Mooney-Rivlin Model from Experiments on Soft Polymers.

ABSTRACT: Having accurate data to represent hyperelastic materials that underpin soft robotics would facilitate their analysis, design, and validation. We seek to provide the reader with a useful tool to overcome a mundane but crucially important problem in determining the hyperelastic material properties. We show how to employ first dimensionless and then dimensional comparisons between experimental data and the classic theoretical model representing this system to produce C₁ and C₂ for the Mooney-Rivlin model, closely representing a variety of soft polymers.

SUBMITTER: Gopesh T

PROVIDER: S-EPMC8403193 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature

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Publications

Facile Analytical Extraction of the Hyperelastic Constants for the Two-Parameter Mooney-Rivlin Model from Experiments on Soft Polymers.

Gopesh Tilvawala T Friend James J

Soft robotics 20200730 4

Having accurate data to represent hyperelastic materials that underpin soft robotics would facilitate their analysis, design, and validation. We seek to provide the reader with a useful tool to overcome a mundane but crucially important problem in determining the hyperelastic material properties. We show how to employ first dimensionless and then dimensional comparisons between experimental data and the classic theoretical model representing this system to produce C1 and C</ ...[more]

PMID: 32758067

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Project description:Given the importance of hyperelastic constitutive models in the design of engineering components, researchers have been developing the improved and new constitutive models in search of a more accurate and even universal performance. Here, a modified hyperelastic constitutive model based on the Yeoh model is proposed to improve its prediction performance for multiaxial deformation of hyperelastic polymeric materials while retaining the advantages of the original Yeoh model. The modified constitutive model has one more correction term than the original model. The specific form of the correction term is a composite function based on a power function represented by the principal stretches, which is derived from the corresponding residual strain energy when the Yeoh model predicts the equibiaxial mode of deformation. In addition, a parameter identification method based on the cyclic genetic-pattern search algorithm is introduced to accurately obtain the parameters of the constitutive model. By applying the modified model to the experimental datasets of various rubber or rubber-like materials (including natural unfilled or filled rubber, silicone rubber, extremely soft hydrogel and human brain cortex tissue), it is confirmed that the modified model not only possesses a significantly improved ability to predict multiaxial deformation, but also has a wider range of material applicability. Meanwhile, the advantages of the modified model over most existing models in the literatures are also demonstrated. For example, when characterizing human brain tissue, which is difficult for most existing models in the literature, the modified model has comparable predictive accuracy with the third-order Ogden model, while maintaining convexity in the corresponding deformation domain. Moreover, the effective prediction ability of the modified model for untested equi-biaxial deformation of different materials has also been confirmed using only the data of uniaxial tension and pure shear from various datasets. The effective prediction for the untested equibiaxial deformation makes it more suitable for the practice situation where the equibiaxial deformation of certain polymeric materials is unavailable. Finally, compared with other parameter identification methods, the introduced parameter identification method significantly improves the predicted accuracy of the constitutive models; meanwhile, the uniform convergence of introduced parameter identification method is also better.

Dataset Information

Facile Analytical Extraction of the Hyperelastic Constants for the Two-Parameter Mooney-Rivlin Model from Experiments on Soft Polymers.

Publications

Facile Analytical Extraction of the Hyperelastic Constants for the Two-Parameter Mooney-Rivlin Model from Experiments on Soft Polymers.

Similar Datasets

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