Dear Friends, I am starting to use Ansys for the modeling of MEMS micromirror static/dynamic analysis. There have been many previous work in this field, but according to my observations, 3 key technologies were basically used for MEMS electromechanical coupling, which are 1. using Coupled Field Element (SOLID226); 2. Multi-field solver; and 3. Trans126. Seems for method #1 I have to use air to enclose the whole device if fringe electric field needs to be considered, but in "Gyimesi, Miklos, Ilya Avdeev, and Dale Ostergaard. "Finite-element simulation of micro-electromechanical systems (MEMS) by strongly coupled electromechanical transducers." Magnetics, IEEE Transactions on 40.2 (2004): 557-560." it says in large deformation bending electrode problem, Trans126 might not be suitable. Do you guys have any previous experience on this selection issue? Besides, seems Trans126 also requires the pre-stress definition, which I am still struggling to find out where to apply... _______________________________________________ Hosted by the MEMS and Nanotechnology Exchange, the country's leading provider of MEMS and Nanotechnology design and fabrication services. Visit us at http://www.mems-exchange.org Want to advertise to this community? See http://www.memsnet.org To unsubscribe: http://mail.mems-exchange.org/mailman/listinfo/mems-talk