Mechanical characterization and performance evaluation of twisted Jute-Kevlar hybrid composites with varied fiber orientations

Abstract

Composite materials play a vital role in developing new materials in engineering and technology. Composites show how the properties of the matrix and reinforcement work together to create more robust, more rigid materials than would be possible from the individual components working alone. They consist of two or more component materials combined with notably dissimilar physical or chemical characteristics. Two categories of composite coupons have been developed in this research work: the first category (C1) is made up of jute twisted-Kevlar twisted jute fiber (0/90 degree), and the second category (C2) is made up of jute twisted-Kevlar twisted jute fiber (0/45 degree). The nano-silica is reinforced with the matrix with a weight percentage of 0%,5%,10% and 15%. This involved various mechanical tests, analysis of wear surfaces, as well as DMA, DSC, and FEA testing, and ultimately, the machining of the composites studied. The machining parameters used in waterjet machining have been carefully analyzed. The tensile strength of S3 in category C1 was 163 N mm ^−2 , while S2 in category C2 had 154 N mm ^−2 . The flexural strength of S3 in category C1 was the highest, with 200.23 N mm ^−2 , and S3 in category C2 had 189.32 N mm ^−2 . The impact strength, hardness values having higher than the Category C 2 composites. Overall, the mechanical behaviour of Category C1 exhibits better performance. An increase in reinforcement shows better damping behaviour in DMA study. The performance of up to 10% of nanoparticles was found to be good, in a thermal analysis (DSC). Morphological analysis revealed improper fiber pullout in the developed composites. The material’s wear performance is similar to adhesive wear, with a slight wear loss in the pin on the disc. The machining parameters of the composite showed a relationship between velocity and surface roughness.

Keywords

• composites
• wear
• jute
• kevlar
• mechanical properties
• DMA