Investigating the lap shear adhesion of coir and glass-fibre reinforced epoxy bonding to mild steel with varying volume fractions

Bonding synthetic fibres to metals improve strength, durability, and corrosion resistance is a prevalent practise in the automotive, marine, aerospace industries. Lap shear adhesion, measurement of bonding strength between composites metallic substrates, essential for structural integrity. The emergence natural fibre as sustainable alternatives makes it investigate their lap behaviour effect volume fraction on composite properties. This research investigates adhesion coir glass epoxy mild steel. Coir fibres, which are known resilience tenacity, were treated with an alkaline solution resin. Samples prepared accordance ASTM specifications, tests conducted using tensile machine. Increasing or decreased bond demonstrated by results. Due fibres’ greater rigidity, exhibited superior strength. However, under loading conditions, steel surfaces. SEM micrographs confirmed that exhibit failure while pull-out behaviour. study concludes highlighting engineering potential considering properties cost-effectiveness. It necessary further optimise fiber-matrix interface comprehend mechanical order maximise effectiveness. To assure long-term durability composite-metal joints, surface preparation, adhesive type, application procedure, environmental conditions must also be considered. At content percentage 10%, 100% higher compared composites. Conversely, at 10% approximately 75% than values obtained 40% fibres. mechanisms observed delamination fracture area loading. reduces Factors such limited space matrix, tension concentrations, contribute weakened bonds. Glass have better rigidity affecting load transfer adhesion. Interfacial crucial, maintaining becomes more difficult fractions, resulting