The reinforcement potential of novel nanocellulose-based scaffolding reinforcements composed of microfibrils 5 to 50 nm in diameter and several microns in length was investigated. The cellulose nanofibril reinforcement was used to produce a three-dimensional scaffolding. A hybrid two-step approach using vacuum pressure and hot pressing was used to integrate the nanocellulose reinforcements in a...

Resin cross-flow during compression molding of unidirectional sheet molding compound composites, such as CSMC and XMC, may cause severe misorientation of the continuous fibers in the outer layers. The extent of fiber misorientation depends on the type of molding compound, the length of cross-flow, and the location of the charge in the mold. The tensile strength is reduced in the direction of cr...

In this study, the water uptake parameters of S glass/epoxy samples have been assessed experimentally. The specimens were manufactured by vacuum assisted resin transfer method (VARIM) kept in distilled and sea at 25°C 70°C temperatures for 1000 hours a hydrothermal aging cabin. gain behavior with different length/width (L/w) ratios has investigated based on criteria such as types temperatures. ...

This research presents a case study of production monitoring on an aerospace composite component: the hinge arm of the droop nose mechanism on the Airbus A380 wing leading edge. A sensor network composed of Fibre Bragg Gratings, capacitive sensors for cure monitoring and thermocouples was embedded in its fibre reinforced lay-up and measurements were acquired throughout its Resin Transfer Mouldi...

One of the most significant defects, porosity, has been proven to affect properties composites. It is critical reduce porosity composite material and curing cost while maintaining high laminate quality for vacuum bag-only prepreg. In this paper, a rapidly cured epoxy resin system was developed, an alkali-free glass fiber fabric prepreg suitable bag molding prepared by asymmetric impregnation me...

This paper deals with a new silicone resin compound that can be cured by addition curing and peroxide curing, respectively. Curing post-curing behavior has been investigated optimized. Numerous trials towards the optimization of binder-filler combinations have performed. The resulting material POWERSIL® Resin 710 respect to its mechanical thermal behavior. exhibits heat class R processed press ...

The successful manufacture of thick-sectioned composites is challenging, since the highly exothermic nature of thermoset resins and limited temperature control make it difficult to avoid detrimental thermal and cure gradients within the composite. In order to make quality parts, it has been found experimentally that cure temperatures must be lowered as much as 50% from those suggested for thin ...

A novel composite manufacturing process monitoring application using fibre-optic (FO) sensors is reported for vacuum-assisted resin transfer moulding (VaRTM) with a rigid-closed mould. fully distributed Rayleigh-Backscattering based load-monitoring approach demonstrated by numerical modelling and experimental application. Lateral fabric compression reliably tracked throughout the entire VaRTM p...

An actively cooled vascular polymer matrix composite containing 3.0% channel volume fraction retains greater than 90% flexural stiffness when exposed continuously to 325 °C environmental temperature. Non-cooled controls suffered complete structural failure through thermal degradation under the same conditions. Glass–epoxy composites (T g = 152 °C) manufactured by vacuum assisted resin transfer ...