Thermal stress

[fabioit]

Hi all,
I'm new of elmer. I'd like to calculate thermal sterss.
In a simple bar with one fixed boundary. All the bar is at 100°C. Which is the linear expantion?
Heat flux is not important because I know the final themperature, 100°C.
How I have to put the boundary condition? All the boundaries at 100°C?


Thank you
Fabio

[raback]

Hi

Yes, if you set all BCs to 300 and have no heat sources you should get a uniform 300 K field. As it is continuous you could introcude it also in the Solver section of the stress solver by

Code: Select all

Exported Variable 1 = Temperature 

and set at the initial condition Temperature to 300. This way no heat solver is needed.

-Peter

[fabioit]

very good!
If the initial temperature was 50° and the final 100°
I only have to put 50° as initial temperature? id est initial temperature is the difference of temperature from initial to final?
thank you.
p.s. Elmer is vary useful for my job. I'm going to introduce in some factories here in Italy.

[raback]

Hi, you could set the initial temperature to the known final temperature and set "Reference Temperature" to 50. -Peter