Development and Performance Evaluation of Impact and shock resistant wallpaperfor Defense application

Abstract

The increasing demand for functionally graded material with minimum specific weight inevery sector paves the way for novel materials development. The prime significance of this research is to develop the shock, impact-resistance and high strength lightweight material which can be recommended for construction and defense application. The performance evaluation of the developed composite against the impact and thermalloading is also an additional objective of the study. The woven Kevlar fabric was impregnated with varying weight percentages of Aluminium Oxynitride (ALON)particles infused epoxy matrix. Three different vol.% of ALON 5, 10, and 15 were usedfor the epoxy matrix preparation. The impact resistance of the material was examinedthrough drop-weight impact testing along with necessary mechanical testing like tensile and flexural. The stiffness and damping capacity of the composite material wereevaluated through Dynamic Mechanical Analysis (DMA). The scanning electron andoptical microscope were employed to analyze the fracture mechanism and damage mechanism after the tensile, flexural and impact failures. The comprehensive study reveals an improvement in tensile yield strength of ALON 15 composites by 1.75 timesas compared with ALON 0 whereas the ALON 15 specimen achieved a noticeable enhancement of 2.59 times in flexural strength than the flexural strength of the ALONfree specimen. The impact resistance, storage modulus, loss modulus, and damping characteristics of 15 vol.% ALON particles infused Kevlar epoxy composite also depictbetter response as compared with ALON-free Kevlar composite.