摩擦学测试方法的理论与实验

O. Dykha, A. Staryi, M. Getman, V. Fasolia
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引用次数: 0

摘要

在分析摩擦副磨损测试方法现状和在一定工况下对测试方法的需求的基础上,解决了根据球筒方案开发摩擦副磨损试验方法理论的问题,这使得确定磨损模型的参数和材料耐磨性的一般特征成为可能。研究表明,在摩擦副参数特性范围内的磨损类型确保符合接触的基本条件:材料、润滑、压力、速度、温度、运动类型和其他不太重要的因素。已经确定,开发和进行磨损试验的基本问题之一是考虑磨损模式在某一点上的平稳性的影响。稳态和非稳态模式(瞬态模式)下的试验方法不同。试验方法应基于摩擦副样品反样品接触问题的解决方案。在解决“球-缸”方案的磨损接触问题的基础上,提出了一种识别磨损模式参数的理论。为了解决逆问题,提出并实现了一种近似函数的方法。实验函数代入解析方程后的幂近似给出了计算模型参数的简单表达式。所获得的结果使预测给定初始操作条件下摩擦副的磨损强度成为可能:根据载荷、滑动速度、润滑剂和结构材料的特性。
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Theory and experiment of tribological test methods
Based on the analysis of the current state of test methods for wear of friction pairs and the need for methods with certain operating conditions, the problem of developing a theory of test methods for wear of friction pairs according to the ball-cylinder scheme was solved, which makes it possible to determine the parameters of wear models and the general characteristics of the wear resistance of materials. It is shown that the type of wear within the range of properties of the friction pair parameters ensures compliance with the basic conditions in contact: materials, lubrication, pressure, speed, temperature, type of movement, and other less significant factors. It has been established that one of the fundamental issues in the development and conduct of wear tests is to take into account the influence of the stationarity of the wear mode at a point. Test methods in steady and unsteady modes (transient mode) are different. The test method should be based on the solution of the contact problem for a friction pair sample-counter-sample. Based on the solution of wear-contact problem for the "ball-cylinder" scheme, a theory has been developed for identifying the parameters of the wear pattern. To solve the inverse problem, a method of approximating function is proposed and implemented. The power approximation of the experimental function after substitution into the resolving equation gives simple expressions for calculating the model parameters. The results obtained make it possible to predict the intensity of wear of tribocouples under given initial operating conditions: according to loads, sliding speed, characteristics of lubricants and structural materials.
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发文量
28
审稿时长
10 weeks
期刊最新文献
Mechanisms of formation of wear-resistant dissipative structures in non-stationary lubrication conditions Research of Increase of the Wear Resistance of Machine Parts and Tools by Surface Alloying Substantiation of a rational program for the running-in of tribosystems Detection of changes in the characteristics and properties of friction zones of parts of tribocoupling systems and machine assemblies based on the entropy approach Study of the regularity of wear influence on the service life of cutting elements of bulldozers’ working bodies
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