EXPERIMENTAL RESEARCHES OF CYCLIC DURABILITY OF POLYMERIC COMPOSITE MATERIALS
Experimental results of cyclic durability of polyester polymer concrete. The method of testing the endurance of polymer composite materials. Found that the decrease in the strength of polymer composite materials under cyclic loading effects are much more intense, due to the fact that with such a force action there is an accumulation of residual strains and microfractures that are created as a result of application of the load in excess of the limit of long-term strength of the weakest particles. Failure occurs when the load is removed, not under load, for the removal of the load from the particles is derived irreversible deformation of the line mark causes the voltage of opposite sign. If a voltage greater than the tensile strength, the particle is destroyed, and in the material as a whole will be microfracture. In addition, under cyclic loading are superimposed independent and different in character creep processes of stress and fatigue stress.