Influence of groove-textured surface on sliding friction in contact with a viscoelastic materialстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 30 января 2024 г.
Аннотация:A model for calculating the friction force during sliding of a rigid surface with a regular texture in the form of parabolic grooves on a viscoelastic material has been constructed. The model is based on solving a 2D contact problem on sliding of a rigid surface of a regular shape on a viscoelastic base by taking into account the local friction law determined by roughness and adhesion in the contact. Relations for calculating the contact characteristics and the friction coefficient depending on the texture parameters, surface roughness, sliding speed, and applied external load are obtained. The developed model has been used to calculate the contact pressure and friction coefficient in the case of dry contact between a textured surface and a viscoelastic material. The contribution of the surface texture to the total friction force of hysteresis losses at the macrolevel and the effect of roughness and adhesion at the microlevel are studied. It has been established that in the studied range of speeds and loads, an increase in the groove size leads to a decrease in the friction coefficient. An example of calculating the coefficient of friction depending on the sliding speed and load for two samples of laminated plywood with different texture parameters and similar parameters of adhesion and surface roughness is given. The calculation results are compared with the experimental data obtained from laboratory tests of plywood in sliding contact with tread rubber.