i want to simulate the bending because of different expansions of two materials which are connected with screws. But I've no idea how to do this with nx (which solver etc).
I calculated the elongation of the two materials and the amount of bending like here:
the elongation was about 0,09 mm and the amount of bending about 0,11
I applied an enforced load on the ends of the two rails (0,05 left and 0,05 mm right) and fixed the girder with a few nodes in the middle (backside).
furthermore i connected the rails with a face gluing contact
the bending in the result was also about 0,1 mm
but as mentioned above, i want to simulate it with temperature (delta T = 20K / alpha1=6 / alpha2 = 12). In the material properties i entered the thermal expansion coefficient, E-module, density and poissons ratio.
any suggestions how to proceed?
thanks in advance
Solved! Go to Solution.
If the materials have been defined appropriately (with different thermal expansion coefficients), then all you need to do is apply a uniform temperature difference.
In SOL 101 (linear statics), create an initial temperature with an appropriate default temperature (i.e. 20C). Create a temperature load with a different default temperature (i.e. 100C).
The solution will compute the expansion for a delta T of 80C.
tank you! This was easier than expected.
btw: I got a warning message because of the glueing connection
dunno why :-/ edit: found it: https://community.plm.automation.siemens.com/t5/NX-Nastran-Forum/What-does-USER-WARNING-MESSAGE-4690...
is it practical to use this kind of connection (glue connection) to simulate the screw joints?
Its the only way the rails dont slide, even when I use surface contact with friction coefficient 5 and 7000N force to push the rail on the girder