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Vestnik Tomskogo Gosudarstvennogo Universiteta. Matematika i Mekhanika, 2023, Number 85, Pages 157–167
DOI: https://doi.org/10.17223/19988621/85/12
(Mi vtgu1036)
 

MECHANICS

On the inversion of nonlinear constitutive relations for hyperelastic anisotropic materials

M. Yu. Sokolova, D. V. Khristich

Tula State University, Tula, Russian Federation
References:
Abstract: The polynomial elastic potentials represented by the power functions of their arguments are considered for hyperelastic anisotropic materials. The conditions for the elastic free energy $W(\varepsilon)$ and Gibbs potential $V(\mathbf{T})$ in isothermal processes are assigned so that the nonlinear constitutive relations can be inverted. For polynomial elastic potentials, whose coefficients are dependent on elastic constants of the second and third orders, a dependence between the coefficients of the potential $W(\varepsilon)$ (elasticity constants) and the coefficients of the potential $V(\mathbf{T})$ (elastic compliances) is obtained.
The relationships between the elastic constants and the coefficients of elastic compliance of the second and third orders for an isotropic material and for an anisotropic material corresponding to a cubic crystallographic system are found. For a copper crystal belonging to the cubic system, uniaxial loading along one of the anisotropy axes is considered. The stress-strain dependence obtained from direct and inverted relations coincides in the vicinity of zero.
The stress-strain dependence calculated using direct and inverted relations for copper crystals has made it possible to determine the strain range in which the results of calculations using direct and inverted relations differ by less than 5%.
Keywords: anisotropy, hyperelasicity, finite strains, tensor bases, nonlinear constitutive relations.
Funding agency Grant number
Ministry of Science and Higher Education of the Russian Federation FEWG-2023-0002
This study was carried out within the state assignment of the Ministry of Science and Higher Education of Russian Federation (No. FEWG-2023-0002).
Received: 18.02.2023
Accepted: October 10, 2023
Document Type: Article
UDC: 539.3
Language: Russian
Citation: M. Yu. Sokolova, D. V. Khristich, “On the inversion of nonlinear constitutive relations for hyperelastic anisotropic materials”, Vestn. Tomsk. Gos. Univ. Mat. Mekh., 2023, no. 85, 157–167
Citation in format AMSBIB
\Bibitem{SokKhr23}
\by M.~Yu.~Sokolova, D.~V.~Khristich
\paper On the inversion of nonlinear constitutive relations for hyperelastic anisotropic materials
\jour Vestn. Tomsk. Gos. Univ. Mat. Mekh.
\yr 2023
\issue 85
\pages 157--167
\mathnet{http://mi.mathnet.ru/vtgu1036}
\crossref{https://doi.org/10.17223/19988621/85/12}
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