Abstract—

The fibrous composite wear rate dependence on the angle between the sliding direction and the direction of the fibers on the friction surface, when fibers in the material are parallel to the friction surface was studied. For this purpose, an experiment was carried out on the wear of a composite material sample based on carbon fiber and a carbon matrix in the form of a disc with a ring-shaped counterbody made of silicon carbide ceramics. The structure of the composite made of carbon twill weave forms on the friction surface areas with fibers oriented parallel to each other and the surface of the material. Setting up the experiment according to the “ring–disk” scheme allows one to obtain a different angle between the direction of the fibers and the direction of sliding in one test. Based on the results of the friction surface relief study after the tests, the relative wear rate of the surface areas, which are characterized by different directions of the fibers, is determined. It was found that areas with fibers directed at an acute angle to the friction direction have greater wear resistance, and fibers located at a right angle to the direction of sliding are more susceptible to destruction during wear. A wear process model of an individual fiber up to its complete destruction is constructed. A phenomenological criterion for the destruction of an individual fiber is proposed, which makes it possible to estimate the effect of the angle between the direction of the fiber and the direction of sliding on the destruction of the fiber. An algorithm for determining the coefficients included in the proposed wear model, based on a limited number of tribological tests, is proposed.

中文翻译：

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纤维铺层方向对纤维复合材料磨损的影响

摘要——

研究了当材料中的纤维平行于摩擦表面时，纤维复合材料的磨损率取决于滑动方向与摩擦表面上的纤维方向之间的角度。为此，对基于碳纤维和碳基体的复合材料样品的磨损进行了实验，该复合材料样品呈盘状，带有由碳化硅陶瓷制成的环形配对体。由碳斜纹编织制成的复合材料结构在摩擦表面区域形成，纤维彼此平行且与材料表面平行。根据“环盘”方案设置实验可以在一次测试中获得纤维方向和滑动方向之间的不同角度。根据测试后摩擦表面起伏研究的结果，确定由不同方向的纤维表征的表面区域的相对磨损率。研究发现，纤维与摩擦方向成锐角的区域具有更大的耐磨性，而与滑动方向成直角的纤维在磨损过程中更容易受到破坏。构建了单根纤维直至完全破坏的磨损过程模型。提出了单根纤维破坏的现象学标准，使得可以估计纤维方向与滑动方向之间的角度对纤维破坏的影响。用于确定所提出的磨损模型中包含的系数的算法，