Method of calculating the surface and adhesion energies of elastic bodies

There are a number of problems for successful solutions to be aware of the surface energy, the energy and the force of adhesion and cohesion. An example is that of the bundle composites. The expression of the energy strength criterion is the total surface energy of the contacting elements or energy of adhesion. These values are determined by methods of the classical theory of elasticity is impossible. Power strength criteria using the limit values of powers – forces of adhesion and cohesion. They are usually determined experimentally, it is not always possible or economically unprofitable. The authors proposed a method for calculating the surface and adhesion energies of elastic bodies in a state of adhesion. It was considered by the authors as follows. Distributed over the boundary of the total surface energy is distributed over its volume free energy change occurring during the formation of the border. The adhesion of the two bodies along the contact surface is formed by a transition layer. In its physical and thermodynamic properties of one body continuously into the properties of another body. The method is based on a variant of the gradient model of continuous elastic medium. It is based on the assumption of many-potential nonlocal interaction infinitely small particles that make up the environment. More to the classic characteristics of the elastic state is calculated by differentiating the known expression bulk density of free energy. It is built on the basis of additional assumptions about the composition of the medium: the elastic part, the phonon and electron (for metals) gases.