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springs, formed metal strip

springs, formed metal strip

springs, formed metal strip

(OP)
A recurring issue is doing the engineering calculations for cantilever or beam type leaf springs, where the "width" of the spring cross section is large in relation to the "height" of the section.
The standard formulae assume that deflection is small wrt the section, but in our case the deflections are typically large.
As an example the strip from which the spring is stamped and formed might be 0.125in wide, 0.020in thick, maybe a 0.5in cantilever and, in service, will go through say 2000 cycles of 0.2in deflection.
Any direction vis-a-vis the best approach, any texts etc that would help us?
Thanks folks!

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