Calculation of Bending (Lateral) Spring Stiffness

[Jordonlaw]

Is there a simple formula for calculating the bending (lateral) stiffness of a coiled helical spring ? I see lots of information on extensional and torsional stiffness but nothing on bending. All help would be appreciated.

 

[israelkk]

Spring Design and Application, 1961 by Nicholas P. Chironis, pages 61-62, titled "How much force to DEFLECT a SPRING SIDEWAYS?"

http://israelkk.googlepages.com/home

 

[Jordonlaw]

israelkk

Thanks for this reference. I haven't been able to locate a copy of this book. Is it possible to quote the equation for the generic case for a helical compression spring please ?

 

[israelkk]

You can purchase it now at less than 30 US$

http://www.alibris.com/search/detai...455&siteID=QqdfFOsQr8c-jn.J43qyQi75LFp..eG9Tw

 

[israelkk]

http://www.bookfinder.com/search/?ac=sl&st=sl&qi=tvVraWByK2wHZC0ieeuuauT8yiA_2563959106_1:1:1