Investigation of the Thermomechanical Behavior of a 2 × 2 TWILL Weave Fabric Advanced Textile Composite

Oztan

Journal of Composite Materials

et al. 2021

Co-curing holds great promise to minimize assembly weight, time, and cost for stiffened aerospace structures, which are conventionally fabricated separately and then integrated either through mechanical fastening or adhesive bonding—also known as secondary bonding. This study presented a low-cost co-curing process using VARTM to fabricate stiffened shells, particularly composite box beams. The experimental investigation was performed and the co-curing process was improved by scrutinizing the critical process parameters, such as foam strength and coating, and curing cycle. This work was also intended to present the demonstration of the proposed co-curing method and its comparison with the conventional secondary bonding technique for three-cell carbon fiber-reinforced polymer (CFRP) composite box beams. Fiber volume fraction measurements were carried out to the specimens extracted from the various section of the co-cured part, namely top skin, web, and bottom skin and as a result, around 60% of fiber volume fraction was measured, which was in good agreement with the results obtained from optical microscopy-based image analysis. Structural-level four-point bending test results showed that the weight normalized maximum and the ultimate load of the part increased by 44% and 45% with the use of the co-curing process, respectively. The improved mechanical properties indicated that stronger structural integration can be achieved by integrally curing structures. SEM micrographs revealed a favorable fiber-matrix interface, bolstering the superior integration of the co-cured part. These findings suggest that the low-cost co-curing process can be a potential candidate for the fabrication of stiffened aerospace structures, such as composite box beams.

Section: Resultssupporting

confidence: 85%

Co-cured manufacturing of multi-cell composite box beam using vacuum assisted resin transfer molding

Oztan

Journal of Composite Materials

et al. 2021

“…3. The woven fiber orientation gives higher strength to the composite in most of the cases [3,[44][45][46][47].…”

Section: Selection Of Natural Fibersmentioning

confidence: 99%

Advances in Natural-Fiber-Reinforced Composites: A Topical Review

Prajapati

Tevatia

Dixit³

2022

Mech Compos Mater

Self Cite

A rapid growth in the research and employment of natural-fiber composites (NFCs) has been observed in the last years. This is explained by their many advantages, such as the biodegradability, eco-friendliness, a relatively low cost, and good mechanical properties. Despite these advantages, they also possess some undesirable features, such as difficulties in processing, high fiber moisture absorption, low impact strength, low durability, poor fire resistance, and poor compatibility between fibers and matrix. Much effort has been applied to minimizing these issues in order to extend the capabilities and applications of this group of materials. In an attempt to provide a better insight into NFCs, an up-to-date review of their manufacturing routes, different applications, and mechanical performance is very required. This review aims to address the above-mentioned issues challenges encountered when dealing with such materials.

Proceedings of the Institution of Mechanical Engineers, Part C:

“…Dixit et al. 4 studied the mechanical performance of 2x2 twill weaved carbon fabric laminates subjected to dynamic loading at room temperature, and in cryogenic conditions. An et al.…”

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical behaviour of kevlar and carbon-kevlar hybrid fibre reinforced polymer composites

Priyanka

Mali

Dixit³

2020

Comprehensive experimental results of dynamic mechanical analysis (DMA) of polymer reinforced textile composites are presented in the current investigation. Plain and 2x2 twill woven multilayer fabrics of monolithic kevlar and hybrid carbon-kevlar (C-K) are reinforced into the thermoset polymer matrix. Kevlar/epoxy and C-K/epoxy composite laminates are fabricated using an in-house facility of the vacuum-assisted resin infusion process. Variation of the visco-elastic behaviour (storage modulus, damping factor and glass transition temperature, Tg) along with time, temperature and frequency is studied for the composites. Dynamic mechanical analysis is performed under temperature sweep with frequency ranging from 1-50 Hz. Results depict the effect of inter yarn hybridisation of carbon with kevlar yarns on the storage modulus, damping performance, and creep behaviour of dry textile composites. Temperature swept dynamic characterisation is also performed to evaluate the degradation and damping performance of the composite laminates soaked in the deionised water at glass transition temperature Tg, ½ Tg, and ¾ Tg. The morphological study has been performed post the dynamic mechanical analysis using field emission scanning electron microscope.