ABSTRACT

In the present work, the effect of erosion variable on the erosion rate of the novel coconut sheath fiber and red mud reinforced polyester composites is evaluated. The composites are fabricated with three forms of fiber reinforcement. Erosion experiment is conducted as per the ASTM G76 by varying impact angle, erodent velocity, and erodent discharge rate. The experiment design is modeled using the central composite design and analyzed using the response surface methodology and analysis of variance technique. The impact angle is found to be the most significant factor affecting the composite erosion rate. From erosion wear analysis, it is found that the interfacial adhesion between the fiber matrix is critical in the reduction of erosion rate. The composite with silane treated fiber showed reduced erosion rate when compared to the untreated and alkaline treated fiber composites. Further, the wear mechanism was analyzed on the eroded specimen using SEM analysis. Finally, the multiple response optimization was carried out using the desirability function method and found that erosion rate can be minimized at impact angle of 90°, erodent discharge rate of 4.45 g/m, and erodent velocity of 70 m/s.

摘要

在目前的工作中，评估了侵蚀变量对新型椰壳纤维和赤泥增强聚酯复合材料侵蚀率的影响。复合材料由三种形式的纤维增强材料制成。侵蚀实验按照 ASTM G76 通过改变冲击角度、侵蚀速度和侵蚀排放速率进行。实验设计使用中心复合设计建模，并使用响应面方法和方差分析技术进行分析。发现冲击角度是影响复合侵蚀速率的最重要因素。从冲蚀磨损分析中发现，纤维基体之间的界面粘附对于降低冲蚀率至关重要。与未经处理和碱处理的纤维复合材料相比，采用硅烷处理的纤维复合材料的侵蚀率降低。此外，使用 SEM 分析对侵蚀试样的磨损机制进行了分析。最后，使用合意函数法进行多响应优化，发现在90°冲击角、4.45 g/m 冲蚀排放速率和70 m/s冲蚀速度下可以最小化冲蚀速率。