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I want to measure insertion force!
Posted 7 nov. 2012, 00:33 UTC−5 Structural Mechanics Version 4.2a 0 Replies
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I'm doing a simulation of insertion force of needle type electrode using COMSOL 4.2a.
But I have some problems..
What I want to do is measuring insertion force of needle type electrode while the electrode inserted in brain with constant velocity. Therefore I chose the "Solid Mechanics" and after modeling the electrode and brain. Then, make the electrode part move toward brain model with constant velocity(using prescribed velocity). And then as the result, I plot the 1D point graph of von Mises stress at tips. I think that there should be clear increase of stress at the moment of penetration through the brain model. But the result showed linear increase irrelevant to brain model.
And also I want to know how much stress will be given to brain model as insertion of electrode. How can I get the result??
Lastly... Can I get the "force" result rather thank von Mises stress?? I wanted to get "force" data. But I couldn't find it.
(In y-axis Data expression of the settings of point graph, I could't find the "force" in categories...)
I attached my comsol file.
Please give me some advises...!! :)
Attachments:
Hello Soowon Shin
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