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Minimization of Stress of a Parabolic Leaf Spring by Simulated Annealing Algorithm

A leaf spring is simple form of spring, generally used for the suspension in automotives. Earlier it was like a slender arc-shaped having length of a spring steel of rectangular cross-section. In this paper analysis is done for leaf spring whose thickness varies from the center to the outer side following a parabolic pattern. The development of a parabolic tapered leaf spring enabled the springs to become lighter, but also provided a much improved ride to the vehicle through a reduction on interleaf friction. To move further, authors take an opportunity to perform a Finite element analysis (FEA) on the spring model so that stress and damage distribution can be observed. In this paper, we describe its basic structure, stress characteristics, engineering finite element modeling for analyzing & high stress zones. The equivalent von-misses stresses are plotted.