Basic approaches and requirements for the design of tribological polymer composite materials with high-modulus fillers

Abstract

Based on a combination of a system-oriented approach and a synergetic concept, the requirements for the design of tribological polymer composite materials with high-modulus fillers are formed. These materials are considered as an open dynamic system that evolves during operation. The principles of the synergetic concept for tribotechnical systems taking into account the theory of evolution and self-organization to ensure its self-governing and self-supporting development are considered. It is revealed that in the process of interaction of elements of the tribosystem the cooperation of local areas of their materials is formed with the emergence of a critical number of such areas and the creation of an information field about their functioning. The direction of self-organization of processes and states of parts materials in the tribotechnical system and expediency of using the conclusions of the synergetic concept in the construction of polymer composite materials, as well as their nonequilibrium are shown. The issues of creation of tribophysical bases of wear resistance of tribotechnical systems with conjugations of the details made or strengthened by polymeric composite materials are considered. Polymer composite materials are considered as a set of interacting ensembles of local areas, the principle of maximum wear resistance (reliability) is used. Tribological principles and requirements to creation and substantiation of expediency and efficiency of use of high-modulus fillers in polymers are formulated

Influence of high-modulus filler content on critical load on tribocouples made of microheterophase polymer composite materials

“…It is possible to predict that in PCM there is such a filler content when the value of its yield strength exceeds the value of the yield strength. In this case, the viscous nature of the destruction of PCM will turn into brittle fracture fracture [13]. In this case, equation (1) will change and take the form:…”

“…; PCM  coefficient that takes into account the shear modulus and Burgers vector of the polymer matrix, as well as the size and shape of the filler particles in PCM [13,14].…”

“…When the PCM is strengthened by the Ansell and Lenel mechanism [3,13,[16][17][18] , the value с  of the three-coupled parts increases with increasing shear modulus of the reinforcing phase and the volume fraction of filler particles in this phase. Under conditions of uneven comprehensive compression PCM with small values of constant elasticity of the filler Ef will be more prone to setting.…”

Substantiation of conditions of effective working capacity of tribocouples of the details made of polymeric composite materials with high-modulus fillers

“…The use of tribocoupling of parts made of polymeric composite materials (PCM) has shown their effectiveness in increasing the durability of systems and units of machines [1][2][3]. However, there is a problem of optimizing the composition of polymer composites from the content of fillers, the distribution of stress fields in the polymer matrix, the geometric shape and concentration of the filler and the development of methods for evaluating the efficiency and reliability of such tribocouples [4,5].…”

“…It is shown that in the PCM the main part of the load is received by the filler. Reinforcing fillers prevent the movement of dislocations in the matrix, which is subject to plastic deformation, limiting it [3]. Strengthening of PCM is carried out by increasing the content of the filler and reducing the distance between its particles.…”