The present study focuses on the effect of moisture uptake of jute/epoxy, hemp/epoxy, flax/epoxy and hybrid composites (jute/hemp/epoxy, hemp/flax/epoxy and jute/hemp/flax/epoxy) on the dynamic mechanical and tribological properties. Composite specimens were developed using hand lay-up compression technique. The developed composites were dipped in normal tap water at room temperature for the span of one year. Three parameters were used to analyze the results of dynamic mechanical analysis (damping capability, storage modulus and loss modulus), and three parameters (friction force, coefficient of friction and specific wear rate) were used to analyze the wear test results. Results of dynamic mechanical analysis and wear analysis after one year of moisture absorption were compared with already published results for specimens without moisture absorption. Substantial changes were observed in each parameter of dynamic mechanical analysis and tribology test performed after one year of water immersion. Water-saturated hybrid composite jute/hemp/epoxy achieved highest reduction of 16.03% in damping capability as compared to its dry specimens. Water-immersed jute/epoxy composite achieved highest increment of 763.2% and 589.8% in the value of storage modulus and loss modulus, respectively, as compared to its dry specimen. Hybrid composite jute/hemp/flax/epoxy achieved the highest increment of 13.5% and 19.9% in the value of coefficient of friction as compared to its dry specimen at 3 and 5 m/s sliding speed, respectively. Water-immersed hemp/flax/epoxy achieved the highest increment of 228.9% and 51.56% in the value of specific wear rate at 1 and 3 m/s sliding speed, respectively, as compared to its dry specimen.

中文翻译：

---

吸湿对聚合物复合材料磨损和动态力学行为的影响

本研究的重点是黄麻/环氧树脂、大麻/环氧树脂、亚麻/环氧树脂和混合复合材料（黄麻/大麻/环氧树脂、大麻/亚麻/环氧树脂和黄麻/大麻/亚麻/环氧树脂）的吸湿性对动态力学性能的影响。和摩擦学特性。复合试样是使用手糊压缩技术开发的。开发的复合材料在室温下浸入普通自来水中一年。采用三个参数对动态力学分析结果（阻尼能力、储能模量和损耗模量）进行分析，采用三个参数（摩擦力、摩擦系数和比磨损率）对磨损试验结果进行分析。将吸湿一年后的动态力学分析和磨损分析结果与已公布的未吸湿试样的结果进行比较。浸水一年后进行的动态力学分析和摩擦学测试的每个参数都观察到了实质性的变化。与干燥样品相比，水饱和混合黄麻/大麻/环氧树脂的阻尼能力降低了 16.03%。与干试样相比，浸水黄麻/环氧树脂复合材料的储能模量和损耗模量值分别提高了 763.2% 和 589.8%。与干试样相比，黄麻/大麻/亚麻/环氧树脂混合复合材料在 3 和 5 m/s 滑动速度下的摩擦系数值分别增加了 13.5% 和 19.9%。