optimization and modification of leaf spring using FEA analysis

Mechanical Engineering

The suspension of leaf spring is one of the important parts of an automobile system as we consider the weight and load carrying capacity of any automobile. The introduction of spring helps in designing better suspension system with better ride quality and that could be achieved with the less increase in the cost and also with less compromise in the quality and working life of the produced. The relationship of the specific strain energy can be expressed in terms of instruments i.e. well known “spring” which is designed to absorb and store energy to release slowly. This ability of spring adds conformability of suspension system. The main objectives of having this new design is to improve ride quality in general by reducing the intensity of forces on its surface and reduce the failure of leaf spring. By implementing this design, the forces acting on it are distributed to the two dampers and to the leaf spring. This helps in the overall balancing of the forces which in turn improve the comfort level. Leaf spring is commonly used in the vehicle suspension system and is subjected to millions of varying stress cycle leading to fatigue failure. A lot of research has been done for improving the performance of leaf spring by modification in design and experimental analysis of leaf springs. In this we will find out the stress concentration in the leaf spring and also the stress limit of the standard Leaf spring by making a 3D model using modeling software and then we will analyse model using Finite Element Analysis. We will also compare the Deflection of the spring using Dampers with that of without dampers assembly at different Loads.

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