Xian Guijun, Qi Xiao, Guo Rui, Tian Jingwei, Xiao Huigang, Li Chenggao
Key Lab of Structures Dynamic Behavior and Control, Harbin Institute of Technology, Ministry of Education, Harbin 150090, China.
Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters, Harbin Institute of Technology, Ministry of Industry and Information Technology, Harbin 150090, China.
Polymers (Basel). 2024 Dec 9;16(23):3446. doi: 10.3390/polym16233446.
Carbon fiber reinforced epoxy resin composites (CFRP) demonstrate superior wear resistance and fatigue durability, which are anticipated to markedly enhance the service life of structures under complex conditions. In the present paper, the friction behaviors and wear mechanisms of CFRP under different applied loads, sliding speeds, service temperatures, and water lubrication were studied and analyzed in detail. The results indicated that the tribological properties of CFRP were predominantly influenced by the applied loads, as the tangential displacement generated significant shear stress at the interface of the friction pair. Serviced temperature was the next most impactful factor, while the influence of water lubrication remained minimal. Moreover, when subjected to a load of 2000 g, the wear rate and scratch width of the samples exhibited increases of 158% and 113%, respectively, compared to those loaded with 500 g. This observed escalation in wear characteristics can be attributed to irreversible debonding damage at the fiber/resin interface, leading to severe delamination wear. At elevated temperatures of 100 °C and 120 °C, the wear rate of CFRP increased by 75% and 112% compared to that at room temperature. This augmentation in wear was attributed to the transition of the epoxy resin from a glassy to an elastic state, which facilitated enhanced fatigue wear. Furthermore, both sliding speed and water lubrication displayed a negligible influence on the friction coefficient of CFRP, particularly under water lubrication conditions at 60 °C, where the friction coefficient was only 15%. This was because the lubricant properties and thermal management provided by the water molecules, which mitigated the frictional interactions, led to only minor abrasive wear. In contrast, the wear rate of CFRP at a sliding speed of 120 mm/s was found to be 74% greater than that observed at 60 mm/s. This significant increase can be attributed to the disparity in sliding rates, which induced uncoordinated deformation in the surface and subsurface of the CFRP, resulting in adhesive wear.
碳纤维增强环氧树脂复合材料（CFRP）具有卓越的耐磨性和疲劳耐久性，预计可显著提高复杂条件下结构的使用寿命。在本文中，详细研究和分析了CFRP在不同加载载荷、滑动速度、服役温度和水润滑条件下的摩擦行为及磨损机制。结果表明，CFRP的摩擦学性能主要受加载载荷影响，因为切向位移在摩擦副界面产生了显著的剪切应力。服役温度是其次最具影响力的因素，而水润滑的影响最小。此外，与加载500 g相比，当承受2000 g载荷时，样品的磨损率和划痕宽度分别增加了158%和113%。观察到的磨损特性的这种增加可归因于纤维/树脂界面处不可逆的脱粘损伤，导致严重的分层磨损。在100℃和120℃的高温下，CFRP的磨损率与室温相比分别增加了75%和112%。这种磨损的增加归因于环氧树脂从玻璃态转变为弹性态，这促进了疲劳磨损的增强。此外，滑动速度和水润滑对CFRP的摩擦系数影响可忽略不计，特别是在60℃的水润滑条件下，此时摩擦系数仅为15%。这是因为水分子提供的润滑性能和热管理减轻了摩擦相互作用，仅导致轻微的磨粒磨损。相比之下，发现CFRP在120 mm/s滑动速度下的磨损率比在60 mm/s时高74%。这种显著增加可归因于滑动速率的差异，这在CFRP的表面和次表面引起了不协调的变形，导致粘着磨损。
