Disc spring deflection
Disc spring deflection
(OP)
Spring force equation for disc spring. F= spring force at deflection s. I know the spring force F and all the other values, but s is unknown.
How do you write the same equation: s=...?
How do you write the same equation: s=...?





RE: Disc spring deflection
You have to run that s/t through the second term and get it separated, i.e., the s/t has been factored out to simplify the equation in terms of F, now it needs to be factored back in. Then you're going to have a quadratic expression in terms of s (I think).
Iteration might be the simplest route to go to home in on an s value that you need.
RE: Disc spring deflection
http://www.circlips.com.au/disc.htm
This is from a link at:
http
Hope this helps. .
RE: Disc spring deflection
We cheated on most applications of disk springs as we got the manufacture to do the calculations.
http://www.schnorr.com/docs/Handbook.pdf
RE: Disc spring deflection
RE: Disc spring deflection
I still wonder how the same thing is written 's=...' Looks simple, but after two hours of trying, no success.
RE: Disc spring deflection
RE: Disc spring deflection
RE: Disc spring deflection
Look in Roark Formulas for Stress and Strain. Definitely, disc spring are covered in the fifth edition. I have set up a spreadsheet for this, and I have even punched in the values from the Schorr catalogue to verify the numbers.
RE: Disc spring deflection
RE: Disc spring deflection
Can you clarify what are you trying to do? Why do you need the "s" value for?
RE: Disc spring deflection
israelkk,
I have a very simple cylinder with a pile of disc springs inside. Number of springs and stacking order are known and always the same. The spring pile has to be pre-loaded to force F meaning that cylinder rod has to start moving when it's pulled with force F (making spring pile shorter).
Since the F is known at th beginning, I thougt I could directly calculate the cylinder length (pre-loaded spring pile length which is needed) in Excel.
In other words, now I have F (pulling force) as a result in one cell in my calc sheet. After getting that F, I have to "manually" change/guess the s value, to get a matching F for the pre-loaded spring pile. Then I can say "if you have this force pulling the cylinder rod, you need this much space for the pre-loaded spring pile"
(Sorry about my poor english)
Easily done with Excel macro or solver function, so not a big problem at all.
RE: Disc spring deflection