Rectangular Wire Coil Spring Stress Calculation
Rectangular Wire Coil Spring Stress Calculation
(OP)
Hello All!
I've been trying to write a matlab program that will calculate stress and deflection of a rectangular cross section coil spring. It has been my hope that I can write an optimization sub-routine just like I have for circular cross section coil springs. I just can't get the theoretical formula to make sense to SMI software predictions!! (SMI - spring manufacturers institute, it's good software and correalates very well to FEA results)
Am i not using the right formula?! I've tried two; NASA design manual formaula, and Roarks. None of these appear to compare to the SMI prediction.
Any help would be appreciated. If you have a formula that seems to work for you please share. Then they can all be located here for all to find!
Thanks.
-Mike
I've been trying to write a matlab program that will calculate stress and deflection of a rectangular cross section coil spring. It has been my hope that I can write an optimization sub-routine just like I have for circular cross section coil springs. I just can't get the theoretical formula to make sense to SMI software predictions!! (SMI - spring manufacturers institute, it's good software and correalates very well to FEA results)
Am i not using the right formula?! I've tried two; NASA design manual formaula, and Roarks. None of these appear to compare to the SMI prediction.
Any help would be appreciated. If you have a formula that seems to work for you please share. Then they can all be located here for all to find!
Thanks.
-Mike





RE: Rectangular Wire Coil Spring Stress Calculation
RE: Rectangular Wire Coil Spring Stress Calculation
Encyclopedia of Spring Design from SMI in the section dedicated to Compression, Extension, Garter and Torsion Springs. Pages S-18 to S-21.
RE: Rectangular Wire Coil Spring Stress Calculation