Climatic aging of composite aviation materials: III. Significant aging factors

The Influence of Internal Stresses on the Aging of Polymer Composite Materials: a Review

“…PCMs are sensitive to moisture [11][12][13][14][15][16][17]. Along with plasticization, additional curing, and hydrolysis [38] of polymer matrices, the moisture saturation of PCMs is accompanied by their swelling.…”

“…Under the action of high temperatures, the thermal aging of PCMs occurs, at which the mass of composite samples decreases, their shrinkage occurs, the surface is damaged by with the formation of microcracks, and the mechanical parameters decrease [6,7,[11][12][13]19]. These characteristic manifestations of thermal destruction become more noticeable if the materials are held in an oxygen (air) environment under an ultraviolet (UV) irradiation [45].…”

“…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].…”

“…The elements of aviation and space technique made of PCMs can undergo repeated thermal cyclings under operating conditions with temperature drops up to 250°C [11][12][13].…”

The Effect of Climatic Factors and Mechanical Loading on the Properties of Carbon-Fibre-Reinforced Plastic Based on An Epoxy Binder

“…It was shown [6] that the effect of a tensile load on the residual strength of glass-fabric laminates depends on the level of the load, the exposure conditions, and the thickness of the loaded specimens. It was established experimentally [7] that the strength of glass-fabric laminate KAST-V decreases during climatic ageing in a warm, humid climate, depending on the level of the tensile stress and the duration of exposure.…”