6. Ratings#

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total strain tensor

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tensor of natural creep deformations

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elastic deformation tensor

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spherical part of the natural creep strain tensor

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reversible spherical part of the natural creep strain tensor

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irreversible spherical part of the natural creep deformation tensor

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Deviatoric part of the tensor of natural creep deformations

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reversible deviatoric part of the tensor of natural creep deformations

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irreversible deviatoric part of the tensor of natural creep deformations

\({\underline{\underline{\epsilon }}}^{\mathrm{fi}}\) complete tensor of irreversible creep deformations

\({\underline{\underline{\epsilon }}}^{\mathrm{fdess}}\) tensor of desiccation creep deformations

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total stress tensor

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spherical part of the stress tensor

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deviatoric part of the stress tensor

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internal relative humidity

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apparent stiffness associated with spherical Kelvin Voigt

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apparent stiffness associated with deviatoric Kelvin Voigt

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apparent viscosity associated with irreversible spherical deformations

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apparent viscosity associated with spherical Kelvin Voigt

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apparent viscosity associated with irreversible deviatory deformations

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viscosity associated with deviatory Kelvin Voigt

\({\eta }^{\mathit{fd}}\) viscosity associated with desiccation creep

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designate respectively a scalar, a vector and a tensor of order 2.

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denote respectively the value of the quantity x at time

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, at the time

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and the variation of

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during the interval

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.