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Technical Paper

Parabolic Leaf Spring Design Optimization Considering FEA & Rig Test Correlation

2011-09-13
2011-01-2167
Parabolic leaf springs are safety components on the suspension system. They provide ride comfort due to calculated stiffness characteristics and they absorb and release energy associated with the road outputs of a fully loaded vehicle. Leaf springs determine the desired vehicle ride height from the ground. As a critical safety part, leaf spring endurance must be ensured. Conventional leaf springs, multi-parabolic leaf springs and parabolic leaf springs are the general types in use. The most commonly used type of leaf spring is the parabolic leaf spring. The main advantages of parabolic leaf springs are that they are lighter, cheaper, with fatigue advantages, and they isolate more noise. Classical leaf spring design and prototype process methodology consists of fatigue tests repeated for each case considering different geometry alternatives, leaf layer additions, material and suspension hard points improvements. This methodology takes a long time and requires a significant budget.
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