sushi75
New member
- Mar 11, 2015
- 84
Hi everybody,
Just a quick question about stresses on shell elements.
I've a got a FE model of a tank, sujected to internal pressure, and I looked at one elements output results.
I wanted to check that given the force and bending moment, I should by hand calc have the same value of the stress from Nastran output, according to sigma=F/S+-My/I
Im aware that membrane forces and bending moments given in Nastran are per unit length, but when I do the calc, the value is not exactly the stresses in the output.
Does this discrepancy comes from the shear force that is not taken into account in the formula? If so, how can I include it?
Hope you can bring some some guidance on that!
Thanks a lot,
Cheers
Just a quick question about stresses on shell elements.
I've a got a FE model of a tank, sujected to internal pressure, and I looked at one elements output results.
I wanted to check that given the force and bending moment, I should by hand calc have the same value of the stress from Nastran output, according to sigma=F/S+-My/I
Im aware that membrane forces and bending moments given in Nastran are per unit length, but when I do the calc, the value is not exactly the stresses in the output.
Does this discrepancy comes from the shear force that is not taken into account in the formula? If so, how can I include it?
Hope you can bring some some guidance on that!
Thanks a lot,
Cheers