Hello Pipers,
Well I have come across something which I would like to share and ask from you guys. While stress analysing for Launcher and reciever piping I have ZERO STRESSES(Bending,Torsion,Code, Allowable) in the stress summary. What is the Specific reason about this? Is this a kind of error in the input or the input needs some optimisation i.e. piping supporting needs some change?
Please advise ?
Regards
Piper

Have you model piping as rigid body ?
In that case caesar will not check any stress and show zero stress in all field.

Hello shr
I accept your answer that for rigid bodies we are getting zero stresses. Can u tell us the reason that why "rigid bodies are getting zero stresses " and zero stress intensification factors...

Hi Bprakash

This is how caesar understand the thing. For caesar rigid body means something like valves, flanges, special piping items, or equipment where stress to be taken care of by another software / design standard. It's beyond piping stress analysis scope.
So if piping is model totally as rigid body caesar will not understand what your requirement is & will show zero stress result.

Hi piper_78

what case are you checking?

You can't compute a stress unless you know the cross-section. So ...

1) In the case of a valve, the cross section varies along the length of the element.

2) The piping attached to a rigid element will become over-stressed long before the rigid element will.

Hi Pipers,
I think I have got the answer , One thing that I am getting the zero stresses in case of rigids only that is correct. Other thing Can it happen the other way also? What I mean whether I can zero stress in non rigid elements also. If yes , then what case it may be and how to rectify it.
BOM i was checking the output stresses where I was getting the zero?
Cheers
Piper_78

Sorry piper I misunderstood your last post..

Yes, thats a property of rigid declaration, it has a zero stress declared.. and for your second question it would be unnecesary to neglect stresses in the element otherwise you have to consider it as rigid, but notice its flexibility change..

Regards!