Search results for query: *

thanks a lot; so now I know that the contour plot has to be interpreted with care especially if the elements have very different orientation. Is it the same for the principal stresses? I guess in that case the orientation of the vector is given by the angle giving no shear. Finally, at a given...

Thanks rb1957. So I have adjacent elements with a different orientation, then how relevant would be the contour plot? Also, when the average of the stresses computed from surrounding nodes is done, it seems that regarding the element orientation, the values picked up would not be the same. So...

Hello, I try to get a better understanding of the meaning of the output vector for stresses in femap, and I'm a bit confused now!! With femap, we can get for a plate element, X normal, Y normal and XY shear stress. So I believe these are the components of the stress tensor. But X and Y are...

AAh the calculated values at the Gauss points give the EXACT value of the integral?!! is it because shape functions are polynomial?

Hello, I think the title is a good summary of the question! During FE process, the stiffness matrix requires integration, and it is approximated at the gauss points. But I wonder how accurate this is. It's a bit strange not to try to calculate the exact value of the integral and instead just...

Thanks for your reply. Well, if I want to know if buckling will occur at 100bar, I have 10 load cases, up to 100 bar. But from the f06 file; there is an ALPHA value for each of the load cases, so it seems like buckling is predicted for each case!! Also, looking at the displacement of the grid...

Hello! I've got a quick question about SOL 106 that I am using for non linear buckling. I've got 10 load cases (10,20,30,40,50,60,70,80,90,100 bar pressure cases), and I would like to predict buckling for that. The output gives me ALPHA values, usually not far from eigenvalues. From this...

I m using Nastran!

Hello, Thanks for these replies! Instead of creating a ramp load via the function, what if I create subcases and create multiset in the analysis deck? For example let's say I ve got a 100 bar pressure load. I create 3 load cases, 10, 50 and 100 bar. Then, I have 'none' in the the load in the...

Hello! I'm fairly new to FEA,so I try to get a good sense of the effect of the element type to know which one to choose for an analysis. I cannot really figure out why a TRIA would be stiffer than a QUAD, same for HEX vs TET. So how can I know which is the best option to choose? I guess the...

Hello! I think the title is a good summary! I have a region on my design which has a interference fit bush, which I modelled with RBE2. The first question is: is it accurate to model it that way? Secondly, by running a non linear static, would having a RBE2 create inconsistent results? I...

Hello everybody, I would like to run a non linear static to account for large displacements. The pressure load to apply has a large magnitude so I would like to create a sort of break down by having incremental loading. Is it possible in femap to do that? I guess I can create several load...