Surface stresses in a layer. Influence of temperature on surface tension and strength (Q2754688)

In the framework of locally gradient models of thermomechanics, subsurface phenomena are described in three-dimensional approach. Here, in thermodynamic description the conventionally used variables are completed with the gradient of chemical potential and the vector of mass bias. Basic relationships are constituted of balance equations for energy density, impulse of mechanical progressive motion, entropy density and mass. The convective component of derivative with respect to time is neglected. As an example of application of the theory, stresses in elastic layer are considered. The layer is mechanically loaded at infinity. At its face surfaces perturbations of chemical potential and temperature are prescribed. An expression for maximal tensile stresses is obtained and parameters of strength are calculated.