The design represents a generality of parts. The part consist of microelements. Physical features of microelements, type of connections between parts determine many characteristics of a design, including dissipation of energy. For their estimation consider cyclic loading of conditional microelement and typical connection between parts of constructions. In result is defined the equation of contour of a loop of a hysteresis and calculate her area at axial loading and a bend. The microelement consists of two ideally elastic particles, disjointed an elasto-plastic stratum. Orientation of a stratum has random character. At loading elastic parts of a microelement tend to move along a stratum. Displacements occur at some ultimate load when shear stress in a stratum reach yield strength. Values of yield limit of different microelements may differ. Therefore examination of character of loading of a device as a whole is necessary conduct with statistical methods. It is supposed, that allocations of an angle, defining orientation of a stratum of a microelement and of yield strength of layers, are the uniforms.