Experimental Studies on the Buckling Strength of Epoxy Matrix Composites Reinforced with Glass Fibre as Core and Carbon/Kevlar Fibre as Outer Layers
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Abstract
Automobile industries worldwide focus more on electric vehicles due to stringent emission norms. They prefer carbon fibre-reinforced composites for body panels due to their lightweight. However, the higher price of carbon fibre restricts its usage. Hybrid laminates made of glass and carbon fibre have the potential to overcome this. An attempt is made in this work to develop a hybrid laminate stacked with carbon or kevlar fibre as the outer layers and glass fibre as the core. Hand lay-up method was used to develop laminates. The buckling test was conducted in a universal testing machine using fixtures designed to support the specimen. The critical buckling load increased by 33% and 55% for glass-carbon hybrid laminates compared to pure glass composite with specimen widths 20 mm and 25 mm respectively. The glass-kevlar hybrid laminates show negative hybrid effects primarily due to limited bonding between glass and kevlar fibre interface. This study found that less volume fraction of carbon fibre can be stacked with glass fibre in an appropriate sequence to yield maximum benefits. These hybrid laminates can be used as load-carrying members for automotive applications such as chassis frames.
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