Large Isotropic Elastic Deformations: On a Comprehensive Model to Correlate the Theory and Experiments for Incompressible Rubber-Like Materials

作者：Afshin Anssari-Benam · 发表于：Journal of Elasticity · 年份：2023 · DOI：10.1007/s10659-022-09982-5 · 被引用次数：62 · 研究领域：Elasticity and Material Modeling、Elasticity and Wave Propagation、Composite Material Mechanics

Abstract A comprehensive model, i.e., a model that: (i) suitably captures the mechanical behaviour of various types of rubber-like materials; (ii) describes the constitutive behaviour of a subject rubber-like specimen under different deformation modes via a single set of model parameter values, and (iii) is parent to many of the existing models of distinct types, is presented in this paper for application to the finite deformation of incompressible isotropic rubber-like materials. The model breaks away from Rivlin’s principal invariants $I_{i}$ I i and Valanis-Landel’s separable function of principal stretches $\lambda _{i}$ λ i representations, and instead adopts a general non-separable functional form $W( \lambda _{1}, \lambda _{2}, \lambda _{3} )$ W ( λ 1 , λ 2 , λ 3 ) , subject to the incompressibility constraint. By way of example, the application of the model to extant datasets from four types of rubber-like materials that exhibit discernible mechanical behaviours, namely natural unfilled and filled rubbers, hydrogels and (extremely) soft tissue specimens, will be considered. The favourable correlation between the model predictions and the considered experimental datasets, obtained via simultaneous fitting of the model to the data of various deformations, will be demonstrated. It will be shown that most of the landmark models in the literature including the $W( I_{1}, I_{2} )$ W ( I 1 , I 2 ) form Mooney-Rivlin, the Gent-like limiting chain extensibility, the nonaffine ...