My question might be out of forum.
However I am just seeking advice
As I have performed experiment as well as FEA and CFD (Using FEMAP and TMG) and now I want to see the percentage error.
Does anybody know how to do uncertainty analysis, any software recommendation or any advice would be very helpful for me?
Many thanks in advance for your support and help.
Most of the answer is in your hands: you have an element library & different analysis types, and also you can play with mesh densities, then use all of those variables an compare results.
Thanks you Blas for the answer.
I understood what you described above.
But my points is how to perform it.
In relation to your above statements, well, my model is in STL Format so cannot vary the mesh size and elements. So cannot do much variation in mesh. But I am using solid linear tetra 4 noded elements
However, I have performed crushing analysis on porous material by choosing elastic – plastic material model.
So now, I have experimental data which consist stress vs strain value and FEA von misses stresses, strain, displacement results.
Now, I wanted to compare experiment vs simulation results to see how much percentage of error occur.
My points is how to perform it, Shall I use basic uncertainty equations or statistics or is there any other way to do.
First at all: TET4 is a "awful" element type, is a constant strain & constant stress element, each point internal in the element has the same stress & strain, then its use should be avoided always, please consider using high-order TET10 elements, in FEMAP you can convert your mesh using MODIFY > UPDATE ELEMENT > LINEAR/PARABOLIC ORDER command. In severe nonlinear analysis the use of high-oder elements is mandatory, and preferable HEX elements instead TET ones.