Modeling of Tribological Processes for Abrasive Wear of Soil-Cutting Part

Abstract. It is shown that simulation modeling of physical processes makes it possible to study the interaction of soil-cutting parts with soil during the observation period of 2-6 hours, when it is required to compress the time scale for creating a new design. (Research purpose) To develop models of the tribological process for abrasive wear of soil-cutting parts based on the combination of simulated loading of friction surfaces with the parameters of the real soil force equivalents. (Materials and methods) This study is based on the simulated loading method and the method of comparing the force equivalents of simulated and real loadings of the friction surfaces of soil-cutting parts using the example of loading flat diagrams. The paper describes the features of non-standard laboratory equipment that facilitates the construction of normal stress diagrams on friction surfaces. As a prototype, a straight wedge opener was investigated. (Results and discussion) As a result the friction surface loading diagrams were obtained with a change in the loosening angles and the range of the stress diagram area from 2,000 to 12,000 square millimeters. The values of force equivalents acting from the real soils of the proposed operating areas were determined. It was noted that combining the characteristics of simulated loading of working parts with the parameters of real soil force equivalents makes it possible to predict the reliability and service life of the created structures of soil-cutting parts. (Conclusions) It has been established that the obtained model of the tribolithic process for abrasive wear of soil-cutting part ensures the superposition of simulated loading results with the values of real soil force equivalents, thus providing a 0.5-1 year reduction in the terms of creating new parts and maintaining the normative indices of technological process reliability and quality.

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