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ABSTRACT
In the present study, water absorption and its subsequent effect on abrasive wear performance of jute–glass–carbon-reinforced composites have been investigated. Nine laminates were fabricated in inter–ply configuration with hand lay–up technique. To evaluate water absorption effect, the prepared composite specimens were immersed in distilled water for 60 days. The effects of the reinforcement hybridization, fibers relative amounts, and stacking sequence on abrasive wear performance for aged and un-aged specimens were investigated using a pin-on-disk wear tester at different normal loads and sliding times. Results indicated that hybridizing glass-reinforced composite with jute and/or carbon fabrics improves the wear resistance of the resulting composite. Stacking sequence has a slight effect on wear resistance whilst fibers relative amounts have a visible effect. Water uptake induces a noticeable decrease in the wear resistance of the studied composites. With increasing the applied normal load and the sliding time, the wear resistance of the composites decreases. SEM observations for worn surfaces display fiber-matrix debonding, multiple cracks, fiber fracture, fiber pull out, debris formation and wear scars.
摘要
本文研究了黄麻-玻璃-碳纤维增强复合材料的吸水性及其对磨损性能的影响. 采用手工铺层技术在层间结构中制备了九层压板. 为了评估吸水效果，将制备的复合材料试样浸泡在蒸馏水中60天. 采用销盘式磨损试验机，在不同的正常载荷和滑动时间条件下，研究了补强混杂、纤维相对含量和堆积顺序对老化和未老化试样磨粒磨损性能的影响. 结果表明，将玻璃纤维增强复合材料与黄麻和/或碳纤维织物混合，可以提高复合材料的耐磨性. 堆叠顺序对耐磨性有轻微影响，而纤维相对量有明显影响. 吸水率使所研究的复合材料的耐磨性显著降低.随着载荷和滑动时间的增加，复合材料的耐磨性降低. 磨损表面的扫描电镜观察显示纤维基体脱粘、多裂纹、纤维断裂、纤维拔出、碎屑形成和磨损痕迹.
Acknowledgments
The authors thank Associate Professor Dr. Mohamed A. Attia, Mechanical Design and Production Engineering Department, Faculty of Engineering, Zagazig University, Egypt for his support and help in completing this work.