hi,
for more complicated shapes (see attachment) I get strange results... I mean it is like this:
Fixing, Moment, Material and Force are not changed during this test.
I turned on "create curved mesh elements", Run Simulation: safety factor result: 4,5
I turned off "create curved mesh elements", Run Simulation: safet factor result: 11,4
I turned on "create curved mesh elements", Run Simulation: safety factor result: 4,23
I turned off "create curved mesh elements", Run Simulation: safet factor result: 11,4
I turned on "create curved mesh elements", Run Simulation: safety factor result: 4,23
I turned off "create curved mesh elements", Run Simulation: safet factor result: 11,27
etc. values are not the same all the time! they're floating
for less complicated models values are stable
what is wrong here?
@marcin.blaszczyk wrote:
.....what is wrong here?
Probably nothing.
Are you running Convergence Analysis?
Attach your file here.
I would assume that a slightly different mesh is created on each mesh update.
JDMather: unfortunately this particular one can not be shared with outside world
Ps. "Covergence analysis" - which option are you writing about?
ccamara01: I thought that algorithm is an algorithm... so you say that results depends on, hmmm, computer's mood ? 🙂
@marcin.blaszczyk wrote:
JDMather: unfortunately this particular one cannot be shared with outside world
Ps. "Covergence analysis" - which option are you writing about..
Do you see this behavior only with this particular file?
Are you saying it can't be reproduced in a simple example file?
What book are you using to learn Inventor FEA? Most books would cover the topics of mesh and Convergence.
this happens only for more complex shapes
see movie attached
I was expecting your file so that I could demonstrate why it is happening with your file.
http://forums.autodesk.com/t5/inventor-general-discussion/easiest-way-to-learn-fea/td-p/5484707
I'll prepare another model with the same effect soon and I'll upload it here.
Before you spend a lot of time on this, you might want to go through this -
http://au.autodesk.com/au-online/classes-on-demand/class-catalog/2014/inventor/md6583
especially Reconciling Differing Results video and the Handout(.pdf)
Basically it is all in the mesh and you have changed the intial condition.
Doing a Convergence Analysis should converge on "the answer".