iMechanica - ANSYS - Loads on deformed shape - Comments

THANK YOU Mr.

ABHIJIT NALAWADE — Thu, 11 Sep 2008 02:20:53 -0400

THANK YOU Mr. GOPINATH

I WAS UNAWARE OF "UPGEOM" COMMAND. I TRIED THIS ONE AND WORKED OUT SUCCESSFULLY.

ABHIJIT NALAWADE

Currently i am the final

Brandon Ng — Mon, 21 Jul 2008 05:30:54 -0400

Currently i am the final semester student of bachelor mechanical
engineering.My final year project is Piezoelectric sensor using ANSYS
for simulation. I facing problems now..i dont knw how to use ansys to
perform the simulation. plx provide me a step by step tutorial.i tried
b4 and the simulation fail due to the meshing problem. The
Piezoelectric sensor simulation is exactly same like the tutorial
provide by ansys in the HELP topic.>>( Piezoelectric Bimorph
beam)..If u guys had done it or tried the simulation b4..plx send the
file to my email . thanks you very much..i am working partime to
finance my living expenses..i am very exhausted..plx help me ..thanks.
brandon_ng83@hotmail.com

UPGEOM

Basak — Sun, 20 Jul 2008 15:10:13 -0400

UPGEOM was the command I was looking for. Thanks a lot!

UPGEOM command will update the deformation:

Gopinath Venkatesan — Sat, 19 Jul 2008 23:58:24 -0400

Basak

You can use the UPGEOM to update the deformation information of the FE model. It only updates the element deformation and not the geometry. But you can apply load further on the deformed element geometry.

Gopinath

Do you mean nonlinear

Chandra Veer Singh — Sat, 19 Jul 2008 15:29:36 -0400

Do you mean nonlinear stress analysis or different load sets? You can easily create muliple load sets in a FE model, each set corresponding to a particular boundary and loading conditions.

But if you have nonlinear or plasticity effects (geometric or material nonlinearity), then your solution is path dependent. For a plastic stress analysis, loading will actually will be applied to the deformed geometry in some way. The usual way in any FE package would be to solve the boundary value problem in a number of load steps. The package will do another iterative solution in a given step, save the results, then increase the step number, use the deformed results from earlier step, solve for the current step and so on. Usually the solution is updated using Newton-Raphson method.

You can read regarding plasticity and non-linear modeling in ANSYS manual (Ch8 - Nonlinear structural analysis). If you want a theoretical understanding I would suggest you to read some FE text on non-linear stress analysis, e.g., Reddy, J. N. An Introduction to Nonlinear Finite Element Analysis.

ANSYS - Loads on deformed shape

Basak — Fri, 18 Jul 2008 15:46:27 -0400

This might be a stupid question but, is it possible to apply loads on a deformed shape in ANSYS? (after applying a set of loads, getting the deformed shape and applying another set of loads on the deformed shape)