Modeling and Analysis of Mono Composite Leaf Spring under the Dynamic load condition using FEA for LCV

Leaf springs are widely used as automotive suspension to absorb shock loads. Suspension system in an automobile determines the riding comfort of passengers and the amount of damage to the vehicle. The main function of leaf spring assembly as suspension element is not only to support vertical load, but also to isolate road-induced vibrations. Another part has to be concentrated, is the automobile industry has shown increased interest in the replacement of steel spring with composite leaf spring due to strength factor and stiffness. Since the composite materials have more elastic strain energy storage capacity and high strength-to-weight ratio as compared to those of steel. It is possible to reduce the weight of the leaf spring without any reduction on load carrying capacity and stiffness. Therefore, analysis of the composite material becomes equally important to study the behavior of Composite Leaf Spring. The objective of the project is to replace the multi-leaf steel spring by mono composite leaf spring for the same load carrying capacity and stiffness by compare stresses and frequencies. Mono-composite leaf spring is designed for the same design specification except thickness so as to obtain the same stiffness for the same load carrying capacity and boundary conditions. Three different composite materials have been considered. They are e-glass/epoxy, graphite/epoxy and carbon/epoxy. Modeling is done by using CATIA V5 R19 and analysis is carried out by using ANSYS 15.0 software.