how does the expansion coefficients depend on temperature?
how is it made in caesarII?
as I see it is not const from range of 20-100 C
and why "begining" temperature (when no deformations) is 21.1111
is there any material(option is Caesar II) where I can change propeties//
Thanks

Rapitop.

Most materials have expansion coefficients that are temperature-dependent. CAESAR II follows the tables of coefficients of thermal expansion given in B31.1 and B31.3 (at least when those are the codes selected). These code tables account for the temperature variance of the CTE and so they contain values that are not constant.

Piping systems are, by convention, assumed to have been installed at 70 F or 21.1111 C. You can change this, read the manual. You can also edit the material properties, but why would you want to? The edit capability for the material tables is primarily for the addition of unusual materials.

RE about changing: just interested in capabilities of CAESAR II..
ok about changing 70 F I'll see manual more carefully (I was searching for it before)

and As I understood I can find information about B31.1 in Unternet& Am I right?

Thanks U very much

The ambient temperature used for the analysis can be changed on the "Special Execution Options" dialog. You can get there from the "Environment" menu, or by clicking the "Guillotine" toolbar button.

sorry, but main question is:
I know that for 310 steel for example 0-100 C is one alpha for 0-315 in another..
http://www.efunda.com/Materials/alloys/s...SI%20Type%20310

but I'm interested in: is any function alpha(T C) in range 0-100 degrees or it is const in this range

Does CAesar II calculate that Young modul depend on temperature

Dear Rafitop,

Expansion cofficient in in/in/degF or mm/mm/degC increses with temperature for most metals used in piping as shown in table C3, Appendix-C of ASME B31.3code.

In Caesar-II, Young's modulus is considered at 70 deg F (21 deg C) as shown in clause 319.3.2 of B 31.3 and the values are available in table C6,Appendix-C of ASME B31.3.

Caesar-II material database takes care of these inputs; you just choose correct piping material & temperature.

Fortunately, Caesar-II has extensive helps & online manuals for preparing yourself.

I often tell to my daughters when they go to school - it will do, if you forget to polish your shoes,but you mush go to class fully prepared academically at least.

Show yourself as a prepared engineer when you ask in a forum.

regards,

sam

DEAR SAM,

Yes of cause U are right)) I should think before questening))
I 've written to much about b31.1 and different "codes"
But can U imagine that there are some part in the Earth, were people have never heard about standarts (americans of canadian) , and they've never seen them!!! Anbd if I'm asking here it means that I was asking you about this function (alha(t) E(T)) because I do NOT know YOUR STANDART, and have NO apportunity to find it for FREE!!