Do you know the difference between triangle and quadrilateral elements?
Theoretical solution will give a von mises stress value of 372.7 MPa
Now let’s try FEA with different number of elements and both with Triangle and quad.
(There is no picture for quad, but I just did the same…with quad)
When you do the calculation, it is actually funny to see how much the difference is actually huge! Same number of elements will give a totally different error in function of triangle and quad.
Here are the same results with pictures:
Do you realize what it means??
To get the same less than 5% error, you will need 16 times more triangle elements than quad elements.
Now let’s assume the speed to solve the problem is proportional to the number of elements (it’s not totally true, but let’s just assume that)
if it takes 1 sec to solve the model for 6346 tetra elements, it will take only 0.06 sec to solve the same problem with quad with less elements but the same accuracy.
So… Do you still want to use triangle/tetra elements??
Let me know what you think about that