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How to switch off thermal strain?

Creator
Creator

In a non linear plane stress analysis (sol 106, sol 601 or multiphysics), I want deflection only due to structural load. Thermal deflections and thermal stress should be neglected. How can I do this in NX 10?

Note: Material properties are temperature dependant and at different time steps temperature is different.

3 REPLIES

Re: How to switch off thermal strain?

Siemens Phenom Siemens Phenom
Siemens Phenom

You cannot do this in SOL 106 or 601.

 

You can do this in SOL 401 by specifying THRMST=NO on NLCNTL

Re: How to switch off thermal strain?

Creator
Creator

I switched off thermal strain by 'Non-linear control parameters>edit>THRMST=NO' and I am getting results which is equal to actual result multiplied by E-3.

If I  solve for single time step by keeping initial temperature and load temperature same (to avoid thermal strain without switching off thermal strain calculation) I am getting correct results.

Why this happens?

 

Re: How to switch off thermal strain?

Siemens Phenom Siemens Phenom
Siemens Phenom

Any time results are off by exactly 1E3, a units issue would be the prime suspect. make sure forces are entered in mN or N as expected. Make sure displacements are being read as m or mm as appropriate.