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Hi Folks, Model description: Two materials stripes are bond together at 200°C. The whole structure is cool down to 20°C. Due to coefficient thermal expansion mismatch, the residual thermal-stress produces deformation. Thus the end of the cantilever bends. (the other end is clamped) I wrote...

Hi Matthias, I found two mistakes: - The relative permittivity must be multiply per the relative permittivity - To select 1/4 of the outer cylinder must swap to Cylindrical coordinate system (see below): 1/__________________ MP,PERX,1,1110*8.854E-12 ! PERMITTIVITY X...

Hi Cbrn and Alex Thanks for you answers. I will add one information for the others Ansys users. The following web site has some good staff: http://www.dermotmonaghan.com/feInformation/analysisTypes/modal.php These could help anybody doing the same job than I. Best regards Renaud

Dear all, I am working on a micro cylindrical structure. Exactly the structure looks as a dish upside down onto a disc and the disc is on a small stand. Finally the stand is attached to the ground. I am looking for the resonance frequencies of this structure. Because of the axial symmetry I...

Hi ybzh, You could have a look to this: ******************************************** INSTITUTE OF PHYSICS PUBLISHING MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING Modelling Simul. Mater. Sci. Eng. 11 (2003) 195–231 PII: S0965-0393(03)57879-2 Finite element analysis and...

Hello Alex, First many thanks for your help. I imagine you have spent some time on my script and some interesting and useful remarks came out of your email. I am going to do some comment on the top of your comments: - The model was not glued together. I use the NUMMRG command on the nodes...

Hi Mihajupb, The structure is Piezoelectric disc cover with a copper sheet of metal. This additional part (sheet of metal) has a cup form and a hole in the middle. (Imagine a dish upside down onto a thick disc) At resonance frequency the top of the structure (dish: copper sheet) moves up and...

Hi everybody, Is there a tutorial or valuable example for modal analysiswith (thermal strain) pre-stress ? My work is about analysis of small structure assembled by adhesive bonding. And I want to show the effect of the thermal stress onto the resonance frequencies. I have done already a lot of...

Well done, Finally I modified the clamping by increase of the area and I found some very different results. I can see clearer now. Thanks

Hi cbrn, Thanks for you advice. The system unit looks ok. The second resonance frequency correlates with experimental results. But I am no wondering if I am not just lucky? In the past, I also used the same material declaration for small cantilevers (multilayers structure) and the results...

Hello, __ __ / \ / \ <- metal top (Cymbal) |___________| | //////////| < - PZT ------------- I am working on a piezo micro motor. This works with High Frequency. A disc is vibrating and other metal parts increase the displacement which occur the final roto-motion…...

Hi Dude, Is there any one who have never seen anything like that??? " !Defines time varying load tables created from function 'voltage' *DEL,_FNCNAME *DEL,_FNC_C1 *SET,_FNCNAME,'varild1' *DIM,_FNC_C1,,1 *SET,_FNC_C1(1),0 *DIM,%_FNCNAME%,TABLE,6,5,1 ! ! Begin of equation...

Hello guys Do you think this method could be used to run an analysis involving initial stress file (file.ist) and other types of initial condition? He used to run my script the following way but I am not happy with results .... read,file.ist Apply initial conditions Solve Do...

Hello Lucy You may find interesting things at the following email address. http://dmtwww.epfl.ch/ims/micsys/ANSYS/tp/index.html Renaud

Hello Do you know how to use the ISFILE command? or ISWRITE I am working on a bi-material beam who bend because of CTE mismatch when temperature rises. I aim at loading my model using the results file and afterward I want to delete one part of my model and finaly I will balance the model. Do...