6. Ratings

total strain tensor

tensor of natural creep deformations

elastic deformation tensor

spherical part of the natural creep strain tensor

reversible spherical part of the natural creep strain tensor

irreversible spherical part of the natural creep deformation tensor

Deviatoric part of the tensor of natural creep deformations

reversible deviatoric part of the tensor of natural creep deformations

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

total stress tensor

spherical part of the stress tensor

deviatoric part of the stress tensor

internal relative humidity

apparent stiffness associated with spherical Kelvin Voigt

apparent stiffness associated with deviatoric Kelvin Voigt

apparent viscosity associated with irreversible spherical deformations

apparent viscosity associated with spherical Kelvin Voigt

apparent viscosity associated with irreversible deviatory deformations

viscosity associated with deviatory Kelvin Voigt

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

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

denote respectively the value of the quantity x at time

, at the time

and the variation of

during the interval

.