magnetic force for structure bending

beewmf

Hi I was given a task to show how a polymer bends. Basically I put a Nickel just on the polymer then a strong magnet underneath. There is space bvetween the magnet and polymer so the polymer is supposed to bend down because of the attraction force between the Nickel and magnet.
I am using the two modules Magnetostatics, No Current and Solid, Stress-Strain. I tested it with the magnetostatics modules only about the magnetic flux. The magnextic flux did go through the Nickel. But later on I added the solid stress module to see the bending. But nothing happened, the total displacement is 0. I am wondering if you guys know the reason?
I use a big box to cover all of them and put air in the box since I read the tutorial models " Permanent Magnet". I think it should be a simple model since once you have the force on Nickel it should at least changes in shape....

Thanks for helping!

thomasnust

Sir, I don't know whether you've already solve your problem, but I know a similar model in COMSOL 4.3a， which may be a help to solve your problem. It is the "Magnetic Damping of Vibrating Conducting Solids", which also combines the AC/DC module and the solid mechanics module. The different is that here the magnetic field is generated by the current.