Dynamic thermoelastic effect in materials with a defect structure

A change in temperature during adiabatic elastic deformation of solids (thermoelastic effect) is determined in terms of the thermodynamic approach taking into account the existence of internal defects in them. A contribution of the defect structure of a material to the Kelvin formula as determined as there are mechanical stresses in a material. It is shown that the changes in the thermal expansion coefficient of a material due to a dependence of the elastic modulus and the defect concentration on temperature can have opposite directionalities.