Check potential energy of elements after FEA?
Check potential energy of elements after FEA?
(OP)
Hello,
In my Finite Element Methods course I learned that the best way to check whether a FEA is precise or not based on the potential energy of the elements. We could do this on paper using the differential equations for simple beams.
But for complex objects, when I do FEA in a software how do I know whether my simulation is stable?
Currently I am using Hypermesh in which there is no option for potential energy.
What could be a better way to do this?
In my Finite Element Methods course I learned that the best way to check whether a FEA is precise or not based on the potential energy of the elements. We could do this on paper using the differential equations for simple beams.
But for complex objects, when I do FEA in a software how do I know whether my simulation is stable?
Currently I am using Hypermesh in which there is no option for potential energy.
What could be a better way to do this?





RE: Check potential energy of elements after FEA?
http://members.ozemail.com.au/~comecau/quad_plate....
http://members.ozemail.com.au/~comecau/quad_shell....
http://members.ozemail.com.au/~comecau/quad_plate_...
Hope this helps.
RE: Check potential energy of elements after FEA?
It needs to be a very small number (usually less than 1.0E-12)
The way I like to think of this is that the difference in energy you apply to the model and the strain energy that is induced in the model is very small indicating that the model is not flying away, or things are not falling apart.
Aerospace Stress Analysis and FEA Courses
http://www.stressebook.com
Stressing Stresslessly!