Abstract In this study, non-hybrid and hybrid (Kevlar, carbon glass) fabric epoxy composite laminates were fabricated with different stacking sequences by hand lay-up followed hot-compression molding. Experimental tests conducted to investigate tensile, flexural, hardness characteristics. It was found that the sequence did not significantly affect tensile strength values of composites; however,...

Tensile stress-strain curves a r e obtained at s t rain rates of %lo-'+, ~ 1 0 and c1000/s for carbon, Kevlar and glass fibre woven-reinforced polyester resin compos i tes and the variation of modulus, tensile strength and fracture strain with strain rate is determined. A change in the failure mode at the highest strain rates is observed for the glass but not the carbon or Kevlar reinforced com...

Composite materials can be defined as a combination of two or more materials that results in better properties than those of the individual components used alone. These materials have high strength and stiffness combined with low density compared to the conventional metals. Polymers are structurally more complex than metals. Polymer – matrix composites are viscoelastic materials and their mecha...

Abstract The study presents the crack mouth opening and propagation of cracks in a composite material printed by extrusion subjected to monotonic loading. is made out nylon matrix (with embedded short carbon fiber—called Onyx ® ) reinforced with continuous Kevlar fibers. Three-point bending tests were performed on notched specimens built according ASTM-E399. Tests digitally recorded extract dis...

Recently, there has been great interest in flexible and wearable energy devices for applications in flexible and stretchable electronics. Even though future developments are moving toward thinner, lighter, and cheaper solutions, many existing energy-harvesting and storage devices are still too bulky and heavy for intended applications. For example, high-efficiency dye-sensitized solar cells (DS...

This part of the study aims to investigate the role of fiber finish during processing on the needlepunching machine. Certain key response parameters like dynamic needling forces and needlepunched fabric properties are analyzed for any possible effect of finish level and its uniformity on these responses. The experiments were performed using polyester and polypropylene, two of the most commonly ...

Ultrasonic vibration was employed in blending the nanosilica into epoxy resin to manufacture hemp/kevlar/nanosilica-based composites, with an ultrasonic occurrence of 20 kHz and a 900 W capacity power. An probe utilized ensure consistent dispersion nanoparticles epoxy. The mechanical characteristics hemp/kevlar fiber reinforced epoxy/nanosilica mat form have been studied. Hand layup procedures ...