Note on sufficient symmetry conditions for isotropy of the elastic moduli tensor
Open Access
- 1 May 1991
- journal article
- research article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 6 (5), 1114-1118
- https://doi.org/10.1557/jmr.1991.1114
Abstract
Group theoretical methods are used to obtain the form of the elastic moduli matrices and the number of independent parameters for various symmetries. Particular attention is given to symmetry groups for which 3D and 2D isotropy is found for the stress-strain tensor relation. The number of independent parameters is given by the number of times the fully symmetric representation is contained in the direct product of the irreducible representations for two symmetrical second rank tensors. The basis functions for the lower symmetry groups are found from the compatibility relations and are explicitly related to the elastic moduli. These types of symmetry arguments should be generally useful in treating the elastic properties of solids and composites.Keywords
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