COMPARATIVE ANALYSIS OF CONVENTIONAL LEAF SPRING AND COMPOSITE LEAF
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Abstract
A leaf spring is a simple form of spring, commonly used for the suspension in wheeled vehicles. It is also one of the oldest forms of spring. Sometimes referred to as a semielliptical leaf spring (SELS) it takes the form of a slender arc-shaped length of spring steel of rectangular cross section. The centre of the arc provides location for the axle, while tie holes are provided at either end for attaching to the vehicle body. In the present work, a seven-leaf steel spring used in passenger cars is replaced with a composite multi leaf spring made of glass/epoxy composites. The dimensions sand the number of leaves for both steel leaf spring and composite leaf springs are considered to be the same. The primary objective is to compare their load carrying capacity, stiffness and weight savings of composite leaf spring. Finally, fatigue life of steel and composite leaf spring is also predicted using life data.
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