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Direct coordinate-free derivation of the compatibility equation for finite strains

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Abstract

The compatibility equation for the Cauchy-Green tensor field (squared tensor of pure extensionwith respect to the reference configuration) is directly derived from the well-known relation expressing this tensor via the vector field determining the mapping (transformation) of the reference configuration into the actual one. The derivation is based on the use of the apparatus of coordinatefree tensor calculus and does not apply any notions and relations of Riemannian geometry at all. The method is illustrated by deriving the well-known compatibility equation for small strains. It is shown that when the obtained compatibility equation for finite strains is linearized, it becomes the compatibility equation for small strains which indirectly confirms its correctness.

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Correspondence to E. I. Ryzhak.

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Original Russian Text © E.I. Ryzhak, 2014, published in Izvestiya Akademii Nauk. Mekhanika Tverdogo Tela, 2014, No. 4, pp. 30–37.

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Ryzhak, E.I. Direct coordinate-free derivation of the compatibility equation for finite strains. Mech. Solids 49, 382–388 (2014). https://doi.org/10.3103/S0025654414040037

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