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Abstract-The rocker arm is an extremely important component in the operation of an internal combustion engine. It is responsible for the opening and closing the intake and exhaust valves. Rocker Arms are typically in between the pushrod and the intake and exhaust valves. They allow the pushrods to push up on the rocker arms and therefore push down on the valves.In the present work, a three dimensional solid model of Rocker Arm is designed with the help of CATIA, the model is saved in .igs format. The model is then transferred to HyperMesh for static analysis. The von-Mises stress and displacement values of rocker arm made from material aluminum ALDC8 alloy is calculated and compared with the available values for validation. The FE analyses of rocker arm for two different materials are also compared. The two materials used are chrome moly steel, and a composite material E Glass/epoxy. The weight of Rocker arm is also compared for these materials.The stress analysis results help to improve component design at the early stage and also help in reducing time required to manufacture the rocker arm component and its cost. The reduction in weight is also helpful in better designing of the engine.

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