Визначення кількості абразивних частинок на поверхні тертя при випробуваннях методом Бринелля-Ховарта

Abstract

Розглянуто моделювання зношування металів при випробуваннях методом Бринелля-Ховарта з метою визначення кількості абразивних частинок у зоні стикання гумового диску та абразиву в кожен момент часу в залежності від розмірів абразивних частинок та гумового диску. Отримані результати дозволяють здійснити зменшення кількості випробувань при збереженні необхідної точності випробувань.

The paper considers the method of testing for abrasive wear according to the Brinell-Howarth scheme with an indication of the structural elements of the installation, which may differ in size, surface geometry and materials. The quantitative rather than qualitative nature of the results of the method is noted, which does not allow the test results to be transferred to conditions other than standard. The tasks are formulated aimed at eliminating the main drawback of research: the lack of models of the studied processes and methods for determining the parameters of these models. Elimination of these disadvantages will allow to extend the research results to natural conditions different from the model ones. In this regard, the task of developing a theory of modeling abrasive wear of metals during tests by the Brinell-Howarth method was established. A mathematical model has been built for determining the amount of abrasive particles in the zone of interaction of a rubber disk and an abrasive at a given time, depending on the size of abrasive particles and a rubber disk. An important component of this work is the real consideration of the interaction of each spherical abrasive particle with a metal sample. Boundary conditions for the application of these models during testing by the Brinell-Howarth method are identified. This modeling is considered in the context with the subsequent de-velopment of this modeling technique. The work considers real processes associated with abrasive wear of materials during test-ing. The paper also considers the basis for the further construction of mathematical modeling of the process of abrasive wear of metals when tested by the Brinell-Howarth method. It is not the average statistical wear of metals that is studied, but the wear of each spherical abrasive particle with further summation of the wear values by weight.