In some modern treatments the difference is made between elastic and hyperelastic materials. Hyperelastic materials are those for which an elastic potential exists and the stresses may be derived from this potential. For elastic materials the existence of such a potential is not necessary. Hyperelastic materials are elastic, but elastic materials are not necessarily hyperelastic. We restrict our considerations, according to this division, to hyperelastic materials.
KeywordsConstitutive Relation Linear Theory Compatibility Condition Lattice Vector Virtual Work
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