Dear,
I wish to know the principal theory behind CAESAR II calculation in [counting/calculating] stress, displacement, etc. is there anyone can give me references for it? because my manual calculation by CAESAR II is different.Just for example, With calculation hand i got the actual stress was 1145,6 Kpa but CAESAR II gives the actual stress was 9456,3 Kpa. I used the equation of SL = Sa + Sip + Sb, where:
Sa = axial stress =
Sip = Longitudinal stress due internal pressure = P.Do/4t
Sb = Bending stress = Mb/Z
Why the result was different? How does CAESAR II calculate the Longitudinal stress, force, moment, displacement. Is there any reference that i can read about theory or principal behind CAESAR II ?
Thanks..

This has been discussed many times herein. Try some searches with different keywords and also print out the "quick reference guide" from the help tab.

http://www.coade.com/ubbthreads/ubbthrea...ch=true#Post229

I would first double and triple check my own calculations. It's horribly unlikely that any of us are going to find a calculational error in a commercial software program that has beenin use for more than 20 years. There may be other sorts of errors that occur as new builds are released, but I suspect that the basic stress calculation routines buried within CAESAR II have been unchanged for quite a long time.

It seems very likely that an error of the order of 8:1 within CAESAR II would have been noticed and corrected before, while a calculation that any one of us does could easily contain such an error if we are not careful. Perhaps you cubed a diameter instead of a radius somewhere...

The default for longitudinal pressure stress in CAESAR II is not PD/4t. The default is [P*Di^2 / (Do^2 - Di^2)], which for some pressures and pipes, can be a significant difference.

If you have to use PD/4t (for benchmarking purposes) there is a switch on the "SIF & Stress" tab of the Configuration Module. (Read the "help text" on this item for additional information.)