Composite Cooling Bifurcation

[servaisj]

Hello,

I am modelling the cooling of a 0/90 composite plate in order to obtain a cylindrical shape at room temperature with Abaqus 6.9. The initial temperature is 180 and the first step is a decrease: between -160 and -180 ; predefined field ; ramp ; constant through region. I use a STATIC procedure with NONLINGEOM.

The fact is, if the applied decrease is between 0 and -165, I still have a saddle shape. But if I apply more, I have a complete cylinder (in the end it forms a sort of straw), even before it reaches -165.

I have already searched for a mistake in my settings but I don't find it.

If you have any idea, I would be grateful,

Thank you very in advance,

servaisj

[Jorgen]

Maybe your temperature amplitude is defined in an unexpected way.
Otherwise, your results sound odd.

-Jorgen