Here is a nice link to Abaqus's performance data for v6.7.
http://www.simulia.com/support/v67/v67_performance.htm
According to them:
Both the element computations and linear equation solution
can be executed in parallel. Parallelization tends to be
more effective with increasing problem...
You can try my program here, but it is only limited to
topology optimzation, i.e finding load path and optimal
shape:
http://www.onlinefeasolver.com/load_path.php
Principal - http://www.OnlineFEASolver.com
General FEA Consulting Services
I would avoid running a model without any constraints. I am surprised such a book would recommend just holding it with springs . Just replace one of the force on your pins with a contraint in the same direction.
Principal - http://www.OnlineFEASolver.com
General FEA Consulting Services
If you have sufficient mesh density then the extrapolated element nodal stress should equal the surface stress. I avoid shell coating since it adds unneccessary degrees of freedom to my models and is another source of modeling errors. Instead I just probe a consistent node where my strain gauge...
I always make a point of avoiding expressing interest in
other women engineers. Most I have found to have a very big
head considering how they are constantly surrounded by
males. Plus why would I want to spend my time competing
with a mirror image of myself?
I know there are...
The thin shells on surface will just give you the surface
stress. I once wrote a program that could extract bending
moments, axial and torsion load going through any planar
cross-section of a solid mesh. I wish most FEA programs
came with this tool as it is very useful for doing
equilibrium...
Just add a datum point at the intersection point and attach
your beams all to this point. So instead of 2 beams, you
will have 4 beams, which all share this one common point.
Principal - http://www.OnlineFEASolver.com
General FEA Consulting Services
Not sure if this applies to zero volume elements, but you can try adding these lines to your .env file:
import os
os.environ['ABA_SKIPSTRICTGEOMCHECK']='YES'
del os
If the bad elements are away from your area of interest, then deleting them should have no effect on your results. Of course this...
Thanks, I have added more info on the problem description
here:
http://www.onlinefeasolver.com/articles/problem.php
The purpose of rounding to nearest 5/10 is so the new
analyst should not think a design with 92 MPa stress is
better than a design with 94 MPa stress. For all practical...
Using the rigid connection to connect the end of a beam to the circular edge of a bolt hole does NOT give any singularity. You have to pick the entire circular edge of the bolt hole, i.e full circumfrance. It locks all 6 dof of the beam with the circular edge, so no rigid body mode is present...
My study is not a code validation for Calculix. It is meant to be a very basic study for a new analyst on effects of mesh density and element type on results. Sadly many FE analysts do not have the advanced technical background required to understand the physics and math behind FEA. So my study...
The linear tets perform suprisingly well for the fine mesh
cantilever beam. They are also good if you are just looking
at relative stresses. I use them for topology optmization
and they give good results for their price. I dont see a
problem using them as long as you have several
elements...
Ad for what? It is an educational study which I am looking for feedback on more cases to compare or any inaccuracies in my findings.
Principal - http://www.OnlineFEASolver.com
General FEA Consulting Services
For those interested I have completed a basic study on mesh
density and element types using Calculix. The results are
here:
http://www.onlinefeasolver.com/articles/mesh.php
Let me know your feedback and if I should model any other
cases.
Principal - http://www.OnlineFEASolver.com
General...
Thanks for posting this link . I checked through most of them and am trying out NETGEN now. It is unfortunate that most of the tools have broken links, I presume the company/service is out of business?
I would also be interested in a 2D mesher that can extrude/revolve elements.
Principal -...
Any suggestions for an open source CAD/Tet mesher ? All I
want to do it create simple volumes using protrusions and
revolutions, then tet mesh the volumes. What do you
suggest?
Principal - http://www.OnlineFEASolver.com
General FEA Consulting Services
Thanks, Ill check into annealing. However I am not concerned with element quality as I just want something pretty to capture.
Principal - http://www.OnlineFEASolver.com
General FEA Consulting Services
I have written a script that does load path analysis by removing elements that are not in the load path. I would like to improve the visual appearance of the optimized mesh. Any suggestions for either creating a smooth cad geometry from the mesh or modifying the mesh to make it smoother and less...
Assuming the geometry is clean and everything is merged
together, it should not take a decent analyst more than an
hour to prepare your powerpoint report. Of course if
geometry is complicated it is a whole different story...
Principal - http://www.OnlineFEASolver.com
General FEA Consulting...
1.01 vs 1.23 does not sounds too far off, perhaps it is
related to mesh density. How about trying fully integrated
elements, i.e remove the 'R' from the element type.
Principal - http://www.OnlineFEASolver.com
General FEA Consulting Services
