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4. Multi-leaf spring
Equal-leaf springs made with parabolic or trapezoidal leaves provide a good material utilization coefficient; they are therefore lightweight, but require costly tooling for their manufacture, which prevents their application to small production runs. In this case, multiple or semi-elliptical leaf springs are used, with leaves of uniform thickness stacked in a bundle. In principle, all the leaves in this bundle have the same circular deformation.
4.1 Circular deformations
The differential equation of the elastic line in bending is :
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Multi-leaf spring
Leaf spring technology
