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CONSTRUCTING A THERMOMECHANICAL WEAR MODEL OF A STEEL–POLYMER FRICTION PAIR WITH THE ACCOUNT FOR THE MATERIAL DESTRUCTION

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A mathematical model of wear of a steel–polymer friction pair without lubrication is proposed. The model is based on the equations of thermal balance and wear kinetics, which take into account energy dissipation during friction and heat exchange with the environment. Unlike traditional approaches, the proposed model includes critical points corresponding to temperature transitions in the polymer, which makes it possible to predict their position based on experimental dependences with high accuracy. Special attention is paid to the destruction of polymer properties under the influence of temperature and mechanical loads, which significantly affects the tribological characteristics of the friction pair. The model is implemented in MATLAB CAD using the finite element method for the numerical solution of the equations of thermal conductivity and wear. The simulation results, compared with experimental data, demonstrate the adequacy of the model and the possibility of its application to optimize the parameters of tribological systems steel–polymer.

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