接触点滚动阻力力矩的装置及测量方法

IF 0.2 Q4 INSTRUMENTS & INSTRUMENTATION
И. З. Джилавдари, С. Мекид, Н. Н. Ризноокая
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引用次数: 0

摘要

滚动摩擦是目前固体接触相互作用规律研究的主要方向之一。解决这一领域存在的问题的复杂性可以从实际上大量的出版物中得到证明,这些出版物的清单还在不断增加。在本文中,关注的是研究从一个球状体的平衡位置位移的滚动阻力矩,该位移远小于接触点的大小。本文描述了作者所研制的单接触摆摆装置的设计,在该装置中,物理摆摆放置在被研究物体的平面上,只有一个球,在垂直平面上作自由的小而稳定的摆动,并描述了一种具有高灵敏度和精度的滚动阻力的特殊测量技术,包括附着力和弹性变形的频率无关力。假设黏附力既具有耗散性又具有弹性,而弹性力与应变速率无关。本文的滚动阻力测量方法的创新之处在于采用了摆幅和摆周期随时间的非线性逼近方法。该近似是根据所提出的振幅衰减和周期变化规律进行的,这与通常的指数规律不同。假设这种方法允许人们评估固体的表面张力和评估接触体表面之间的粘附力压力,以及建立滚动阻力力矩的解析形式。构造了摆锤滚动阻力矩随摆幅的变化曲线。对钢-钢、钢-玻璃、钢-电工硅等接触体进行了实验。假定接触点处的压力不超过弹性极限。所开发的单球摆装置和所提出的测量方法,为研究滚动体在静止状态下的微、中尺度位移条件下的滚动阻力机理规律开辟了广阔的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Device and Measuring Method the Moments of Rolling Resistance Forces on the Contact Spot
Currently, the study of rolling friction is one of the main directions in the study of the laws of contact interaction of solids. The complexity of solving the problems existing in this area is evidenced by the practically vast number of publications, the list of which is constantly growing.In this paper, attention is paid to studies of the moments of rolling resistance at displacements from the equilibrium position of a ball-shaped body that are substantially smaller than the size of the contact spot. The purpose of the present work is to describe the design of the single-contact pendulum device developed by the authors, in which the physical pendulum, resting on the flat surface of the body under study with only one ball, makes free small stable swings in a vertical plane, as well as in the description of a special measurement technique with high sensitivity and accuracy rolling resistance forces, including adhesion forces and frequency-independent forces of elastic deformations. It is assumed that the adhesion forces can exhibit both dissipative properties and elastic properties, while elastic forces are independent of the strain rate.The originality of the method of measuring rolling resistance in this paper consists in using the method of nonlinear approximation of the dependence of the amplitude and period of swing of the pendulum on time. The approximation is carried out on the basis of the proposed laws of amplitude decay and period variation, which differ from the usual exponential law.It is assumed that this approach allows one to evaluate the surface tension of a solid and evaluate the pressure of adhesion forces between the surfaces of the contacting bodies, as well as to establish an analytical form of the moment of rolling resistance. The curves of the dependence of the rolling resistance moment on the swing amplitude of the pendulum are constructed. Experiments were performed for the following pairs of contacting bodies: steel-steel, steel-glass, steel-electritechnical silicon. It was assumed that the pressure at the contact spot did not exceed the elastic limit.The developed single-ball pendulum device and the proposed measurement procedure open up new wide possibilities for studying the laws of mechanisms of rolling resistance under conditions of microand mesoscale displacements of a rolling body from a state of rest.
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来源期刊
Devices and Methods of Measurements
Devices and Methods of Measurements INSTRUMENTS & INSTRUMENTATION-
自引率
25.00%
发文量
18
审稿时长
8 weeks
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