The Biot Stress-Right Stretch Relation for the Compressible Neo-Hooke-Ciarlet-Geymonat Model and Rivlin’s Cube Problem
Year: 2025
Author: Ionel-Dumitrel Ghiba, Franz Gmeineder, Sebastian Holthausen, Robert J. Martin, Patrizio Neff
Communications in Mathematical Analysis and Applications, Vol. 4 (2025), Iss. 1 : pp. 112–150
Abstract
The aim of the paper is to recall the importance of the study of invertibility and monotonicity of stress-strain relations for investigating the nonuniqueness and bifurcation of homogeneous solutions of the equilibrium problem of a hyperelastic cube subjected to equiaxial tensile forces. In other words, we reconsider a remarkable possibility in this nonlinear scenario: Does symmetric loading lead only to symmetric deformations or also to asymmetric deformations? If so, what can we say about monotonicity for these homogeneous solutions, a property which is less restrictive than the energetic stability criteria of homogeneous solutions for Rivlin’s cube problem. For the Neo-Hooke type materials we establish what properties the volumetric function h depending on detF must have to ensure the existence of a unique radial solution (i.e. the cube must continue to remain a cube) for any magnitude of radial stress acting on the cube. The function h proposed by Ciarlet and Geymonat satisfies these conditions. However, discontinuous equilibrium trajectories may occur, characterized by abruptly appearing non-symmetric deformations with increasing load, and a cube can instantaneously become a parallelepiped. Up to the load value for which the bifurcation in the radial solution is realized local monotonicity holds true. However, after exceeding this value, monotonicity no longer occurs on homogeneous deformations which, in turn, preserve the cube shape.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/cmaa.2024-0026
Communications in Mathematical Analysis and Applications, Vol. 4 (2025), Iss. 1 : pp. 112–150
Published online: 2025-01
AMS Subject Headings:
Copyright: COPYRIGHT: © Global Science Press
Pages: 39
Keywords: Neo-Hooke-Ciarlet-Geymonat bifurcation Rivlin’s cube problem invertibility Hilbert-monotonicity Biot stress-stretch relation.