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Originally called a laminated or carriage spring, and sometimes referred to as a semi-elliptical spring, elliptical spring, or cart spring, it is one of the oldest forms of vehicle suspension. A leaf spring is one or more narrow, arc-shaped, thin plates that are attached to the axle and chassis in a way that allows the leaf spring to flex ...
Due to their mode of action, flexures are used for limited range motions and cannot replace long-travel or continuous-rotation adjustments. [6] Additionally, special care must be taken to design the flexure to avoid material yielding or fatigue , both of which are potential failure modes in a flexure design.
As in a coil-spring suspension design, the FRP mono-leaf spring supports the weight of the vehicle. However, the FRP leaf springs differ from steel coils and traditional steel multi-leaf springs in a number of significant ways. The FRP plastic springs have 4.3–5.5 times the strain energy storage per weight, compared to steel. [7]
The spring rate or spring constant of a spring is the change in the force it exerts, divided by the change in deflection of the spring. Vehicles that carry heavy loads, will often have heavier springs to compensate for the additional weight that would otherwise collapse a vehicle to the bottom of its travel (stroke).
The strut suspension of the pre-war Stout Scarab could have been an influence, and long-travel struts in aircraft landing gear were well known by that time. [ citation needed ] The French Cottin-Desgouttes utilized a similar design, albeit with less sophisticated leaf springs , [ 7 ] [ 8 ] but the Cottin-Desgouttes front suspension was in turn ...
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