Pretension using Temperature Difference

[Andreaschar]

Hi,

I am trying to simulate a wire that is pretensioned and clamped on a ring and then loaded transversely.
I apply a negative temperature on the wire (I modelled the wire alone with axial loading and found the appropriate temperature) but the results are way off the expected results. I found that the temperature does not have any effect when the transverse load is applied but when I run the simulation without a transverse load the wire shrinks.
I am running a linear solution, apply initial temperature and temperature load to all components (20 to everything except wire, -150 for wire)
Anybody has any idea why is that?

Thank you

 

[BlasMolero]

Hello!,
Plase share your model (or create a simply pilot study to recreate the problem), we can take a look to it.
Best regards,
Blas.

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Blas Molero Hidalgo
Ingeniero Industrial
Director

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[Andreaschar]

Thank you for your reply,
please find attached a simplified 1D model. I have tried applying a negative temperature load or an axial load of 1275N which is equivalent to the required pre-tension value but I always get around 19.6 mm of deflection. Any advice?

 

[Tuw]

Hi,

I found it interesting and took a look in it. The temperature load does produce an axial force of 1271.1N (I managed to output this by turning on the force output in Output Request).

And my observation about the deflection is same as yours - does not change with and without temperature loading.. I think the phenomenon that you are expecting is out of the realm of linear static. Try nonlinear Sol106 with large displacement.

Regards,
Tuw

 

[Andreaschar]

I managed to get it to work using SOL601 with large displacements enabled.

Thanks