Local nature of the stress-strain state of a composite material subjected to frictional forces

Galvanic powder coatings for tribotechnical purposes

“…The thesis that "to every action there is a reaction" can be assumed as a basis of doctrine concerning protection materials for tribotechnical purposes, as appropriate to the purpose, method, and technique of realizing the deposition technology of wear-resistant coatings with independent counteraction [2]. If the equality of the gradients in the active and reactive components provide a condition for optimization in the basic technologies for forming the composition, structure, and properties of the friction surfaces, so the necessary condition to optimize the tribotechnical characteristics in friction pairs is the use of gradient coatings of matrix, skeletal, or layered type, in which the number, size, form and distribution of structural elements are determined by necessity to create respective antigradients.…”

“…It is shown that there is high carrying capacity and adequate wear resistance in coatings of gradient type containing nanocomposite matrices and uniformly distributed macroscopic impurities. The best material for sliding friction under high loads is dispersion-hardened or diffusion-alloyed matrix deposited on oriented crystalline eutectic layer (columnar type) containing macroinclusions which are linked by diffusion interaction zones with the metal matrix and the substrate.It has been shown in research on gradient coatings [1] that the features of the composition, structure, physicochemical, and mechanical properties of the material, the specimen, the working item, and so on are presented near the surface, while there may be a damaging effect from components of the medium, which tend to concentrate at the surface and which may be accompanied by penetration into the material or localized in a zone of a certain depth.The thesis that "to every action there is a reaction" can be assumed as a basis of doctrine concerning protection materials for tribotechnical purposes, as appropriate to the purpose, method, and technique of realizing the deposition technology of wear-resistant coatings with independent counteraction [2]. If the equality of the gradients in the active and reactive components provide a condition for optimization in the basic technologies for forming the composition, structure, and properties of the friction surfaces, so the necessary condition to optimize the tribotechnical characteristics in friction pairs is the use of gradient coatings of matrix, skeletal, or layered type, in which the number, size, form and distribution of structural elements are determined by necessity to create respective antigradients.…”

Investigation of Tribological Properties of Two-Component Bidisperse Epoxy-Polyester Composite Materials for Its Use in the Friction Units of Means of Sea Transport

“…The modern shipbuilding industry is one of the largest consumers of synthetic polymeric materials. Areas of their application are diverse, and prospects of use cover a wide range [1][2][3][4]. Polymers are used to make ship hulls and body structures, to create details of ship mechanisms, instruments and equipment, to protect metal from corrosion, decoration of premises, their heat, sound and vibration isolation, and others.…”

Friction Composites: Traditions and New Solutions (Review). Part 2. Composite Materials

“…The stressed-strained state of composite materials loaded by friction forces has been studied theoretically and experimentally [18][19][20][21][22]. It has been shown that local stress fields depend on the rule for the change in properties in the transitional zone [18,19].…”

“…It has been shown that local stress fields depend on the rule for the change in properties in the transitional zone [18,19]. If the transitional zone contains a separate phase whose elasticity modulus does not change through its thickness and markedly exceeds the elasticity modulus of the inclusions, stresses in the inclusions are markedly reduced.…”