评估碳-碳复合材料表面的热膨胀效应对环形样品接触相互作用的影响

IF 0.5 4区 工程技术 Q4 ENGINEERING, MECHANICAL
I. Yu. Tsukanov, A. N. Lyubicheva
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引用次数: 0

摘要

摘要--碳-碳复合材料(CCCM)可用于制动系统和活动密封接头,因为根据其结构的不同,它们既具有摩擦特性,也具有抗摩擦特性。在最近的研究中,我们获得了各种 CCCM 的热性能数据,以及与各种对偶体的摩擦系数随温度变化的函数关系。在这种情况下,摩擦系数和线性热膨胀系数与温度的关系性质相似,且临界点接近。本文研究了加热隔热环形冲头与半空间的接触相互作用,半空间的热膨胀系数取决于温度。在接触区域的不同温度分布下,获得了计算接触压力和冲头穿透力的分析表达式。考虑到接触面的不均匀加热,计算了环形冲头与弹性半空间摩擦作用时的温度分布。考虑了旋转摩擦加热过程中的温度分布情况,这种情况在由 CCCM 制成的界面的摩擦学测试和操作中非常典型。结果表明,在所考虑的情况下,温度从环形冲头的内半径向外增加。研究了环宽和温度分布对接触压力值的共同影响。计算表明,考虑摩擦加热对于窄冲头更为重要,而在外部载荷值固定的情况下,接触区域的最小压力会显著降低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Evaluation of the Thermal Expansion Effect of the Carbon–Carbon Composite Surface on Contact Interaction with a Ring-Shaped Sample

Evaluation of the Thermal Expansion Effect of the Carbon–Carbon Composite Surface on Contact Interaction with a Ring-Shaped Sample

Evaluation of the Thermal Expansion Effect of the Carbon–Carbon Composite Surface on Contact Interaction with a Ring-Shaped Sample

Carbon–carbon composite materials (CCCMs) are used in brake systems and in movable sealing joints, since they can have both frictional and antifriction properties, depending on their structure. In recent studies, data were obtained on the thermal properties of various CCCMs and the coefficient of friction in a pair with various counterbodies as a function of temperature. In this case, the nature of the dependences of the friction coefficient and the coefficient of linear thermal expansion on temperature is similar and has close critical points. The paper investigates the contact interaction of a heated heat-insulated annular punch with a half-space, the thermal expansion coefficient of which depends on temperature. Analytical expressions are obtained for calculation of the contact pressure and the penetration of the punch for various temperature distributions over the contact area. To take into account the uneven heating of the contacting surfaces, the temperature distribution under the annular punch was calculated during its frictional interaction with the elastic half-space. The case of temperature distribution during heating from spinning friction, which is typical for tribological tests and operation of interfaces made of CCCMs, is considered. It is established that in the considered case the temperature increases from the inner radius of the annular punch to the outer one. The joint effect of the ring width and temperature distribution on the value of contact pressures is studied. Calculations show that taking into account frictional heating is more important for narrow punches, while the minimum pressure in the contact area can significantly decrease at a fixed value of the external load.

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来源期刊
Journal of Friction and Wear
Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
1.50
自引率
28.60%
发文量
21
审稿时长
6-12 weeks
期刊介绍: Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.
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