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#5577 - 05/10/06 12:41 AM caesar output result
vijay1983 Offline
Member

Registered: 01/24/06
Posts: 8
hi all,
can you please tell me that if i have following data at a node in caesar II,
1. displacements in expansion condition
2. temperature
3. pressure
4. material properties etc,
can i calculate the axial, bending,torsion, code stresses at that node analytically? this is just to understand the working of the CAESAR II.
if yes, then please tell me, which formulas to use to compute theses stresses analytically.
The values are,
displacements
ope (30.4012,0.7444,-4.4560)
temperature 280 0C
pressure 900 kPa
material SA 106B


Thanks in advance.
_________________________
vij

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#5578 - 05/10/06 08:24 AM Re: caesar output result
Dave Diehl Offline
Member

Registered: 12/14/99
Posts: 2382
Loc: Houston, TX, USA
You'll have to do better than that.

The Code-defined expansion stress range is unique to the piping code. In B31.3 it is composed of the bending moment on the pipe, the stress intensification factor for the component (bend, tee, etc.), and the pipe section modulus (a fuction of the pipe moment of inertia and the pipe outside radius). The stress intensification factor indicates the fatigue "weakness" of the component with respect to a girth butt weld under similar fatigue load.

Your data provides no clue to the expansion stress range.

Define the dimensions of the pipe or pipng component and the change in bending moments on that element (you know, that free body diagram that you worked with in your statics class). We can work from there.

But, yes, you can do the stress calculation by hand.
_________________________
Dave Diehl

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