A low concentrated polystyrene (PS) additive to epoxy is used, since it is able to reduce the curing reaction rate but not at the cost of increasing viscosity and decreasing glass transition temperature of the curing epoxy. The modified epoxy is cocured with a compatible thermoplastic interleaf during the vacuum assisted resin transfer molding (VARTM) to toughen the interlaminar of the composit...

Damage detection methodology utilizing A-scan and C-scan concept for detecting flaws for composite structure has been presented Ultrasonic bulk wave has been used for non-destructive testing of the composite specimen. Carbon fiber composites have been tested for different types of damages using longitudinal waves. Two sample specimens consisting of a de-lamination, a through hole, and resin ric...

The problem of improving the delamination resistance and toughness of laminate fiberreinforced composites especially for the drop-off structure is receiving considerable attention with the increasing need and application in industries. A hot melt-bonding process is developed to bond glass fabric laminates and the thermoplastic (TP) polysulfone (PSU) interleaf prior to the vacuum assisted resin ...

A composite panel containing three stringers and two frames cut from a vacuum-assisted resin transfer molded (VaRTM) stitched fuselage article was tested under uni-axial compression loading. The stringers and frames divided the panel into six bays with two columns of three bays each along the compressive loading direction. The two frames were supported at the ends with pins to restrict the out-...

Abstract In this study, the mechanical properties of plain woven jute-epoxy composite materials were investigated after filling graphene nanoplatelets (GNPs) in different proportions. The time dependent changes viscosity and temperature unfilled epoxy resin, with 0.5, 1 2 wt.-% filled resins observed. Woven jute reinforced unfilled, 0.5 GNPs plates produced by using vacuum assisted resin transf...

In response to the defects of easy delamination, poor impact resistance, and low toughness in laminates, intra-layer aramid/glass hybrid weft-knitted reinforced composites without lamination were designed prepared. This paper investigated tensile, bending, composites. Homogeneous with glass: aramid ratios 1:1, 2:1, 3:1, modes transverse hybrid, oblique vertical interlocking prepared by vacuum r...

In this research work, samples of the biocomposite were manufactured using vacuum assisted resin transfer molding (VARTM) technique, whose matrix is a polyester and reinforcement biaxial fabric (90°) made with jute fiber. Then, tensile flexural tests carried out on standardized specimens under ASTM standards, in order to mechanically characterize jute-polyester biocomposite. both destructive te...

Carbon fiber reinforced polymers (CFRPs) have spread to a wide range of industries in recent decades, including the automobile, aeronautics, and space industries. Recently, emergence new requirements for improved properties features has become one major drivers introduction innovative methodologies process optimization. In this study, effect nanomaterials on behavior carbon fiber-reinforced pol...

Abstract Carbon fibre reinforced plastic (CFRP) manufacturing cycle time is a major driver of production rate and cost for aerospace manufacturers. In vacuum assisted resin transfer molding (VARTM) where liquid thermoset infused into dry carbon reinforcement under pressure, the design distribution network to minimize fill while ensuring preform completely full critical achieving acceptable qual...