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contact analysis - force control

contact analysis - force control

contact analysis - force control

(OP)
Hello.
My name is Agatha and I'm new here. I have to make a numerical experiment in MSC.Patran (Marc for calculation) What i can do and what i did for now:
I have made a simulation with this kind of contact:
a) spherical intender -1D    + flat sample - 2d. I used isomesh, this square shape elements, i have also non linear model of material. I can make a simulation with move control -displacement (vector) as it is in contact - rigid body. Simulation goes fine. I have got good results. So mesh, and material are good. I have to mention that it is only one displacemrnt. intender goes e.g. 1mm down and goes back to previous position. This is how it works. Now i have to make a new simulation.:

aa) I have to control movement by force. So first, the intender is pushed down my force (like in Brinnell test) 100N for e.g 5 seconds, goes back to previous position - force 0 - 5seconds; one more time is pushed down - force 150N - 10 seconds, goes back to 0 10seconds, third time is pushed... i have to make 8 this kind of moves :) and i do not know how.

I attached drawing http://files.engineering.com/getfile.aspx?folder=b40d4c1d-328e-4a36-8214-a632b82ee0eb&file=hardening_test.jpg with Mesh and i have put some notes. I use Patran 2010. Marc is used only for calculations. Sample is deformabe, intender - rigid body.

Thank You for all your help! and sorry for my English.  

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