“…When considering the causes for aging of polymer composite materials (PCMs) based on thermosetting binders mentioned in the foreign [1][2][3][4][5][6][7] and domestic [8][9][10][11][12][13][14][15][16][17] literature, the influence of temperature, humidity, solar radiation, oxygen, chemically active substances, erosion, precipitation on condition of matrices, reinforcing fillers, polymer-filler interfaces are discussed. Under the influence of these factors, destruction, hydrolysis, additional hardening, swelling, plasticization, structural relaxation and other physicochemical transformations occur in them, which accelerate or slow down the changes in their mechanical parameters [16]. In recent years, an in-depth analysis of significant factors affecting the properties of PCM has been carried out [5,[17][18][19][20][21][22]; however, when discussing the regularities observed, an insufficient attention is paid to such an important factor of influence as the action of internal stresses [23].…”