Hello!
Could somebody help me? I would like to understand how the CAESAR makes the algebraic combination and the scalar combination. What is the difference between them? Could you give me an example? In the user guide is recommended to use the algebraic combination for expansion cases, however in the description of the algebraic combination is not recomended to use algebraic combination to stress. How could I analyse the stress in the expansion case if I use the algebraic combination. This makes sense?
I am completely lost about this topic.
Thank you,
Sussu

There is a good description, with numeric examples, in the "help text" for that particular column in the Load Case Editor. Just click anywhere in that column and then press [F1].

I tried this description, but is not clear for me. That is why I'm asking for more examples or a detailed explanation. For example, by the F1 help I understood that we cannot analyse cases of stress when we use the case algebraic, however it is not true according the Guide of User. Do you have an example for each one (algebraic, scalar, SRSS and Abs) and the difference between them?

Thank you,
Sussu

Here :

Take two numbers, 125 and -218, then:

An algebraic combination would yield (125 + -218) = -93 )
An absolute combination would yield ( abs(125) + abs(-218) = 343 )
A max combination would yield (-218)
A signed max combination would yield (125)
A signed min combination would yield (-218)

Best regards

But look the F1 help:

If you have the algebraic and scalar you have a signed combination (like above). But, why the combination with stress is different? Example of F1:
Algebraic: sqrt(100*100+100*100)
Scalar: 100+100
The algebraic is not a true value? Then shouldn't I use algebraic combination for expansion cases when I analyse stress in pipe?

Thank you,
Sussu

Example :
If you have two bending moments in the pipe (Mx and My), then you have
at 0 degrees (uper side) bending stress 100 from Mx and at 90 degrees a bendig stress 100 from My.

Now you habe 2 options algebraic and scalar.
Algebraic is true value ( result stress from both moments at 45 degrees).
Scalar method is a additional conservative option i mean.

Perhaps this will help...

Thank you!

But someone understood why in the last item of this summary stress=Mres/Z. This is not force?

Sussu