COMSOL Forums: Resistivity change vs deflection
http://www.comsol.com/community/forums/general/thread/35497/
Most recent forum messagesSat, 16 Mar 2013 13:46:55 +0000COMSOL Forums: Resistivity change vs deflectionhttp://www.comsol.com/shared/images/logos/comsol_logo.gif
http://www.comsol.com/community/forums/general/thread/35497/
Re: Resistivity change vs deflection
http://www.comsol.com/community/forums/general/thread/35497/#p98210
Hello Dear Ivar,<br />
Thank you very very much. You solved my problem.<br />
<br />
Best regardsSat, 16 Mar 2013 13:46:55 +000035497.1363441615.98210Re: Resistivity change vs deflection
http://www.comsol.com/community/forums/general/thread/35497/#p98177
Hi<br />
<br />
you mean the electric resistance of a conducting media ? I believe so, even the joule heating uses that, implictely, the simples draw your conductor, add one terminal to GND, the second to a given V or I, then solve and plot V/I, it's as simple as that.<br />
<br />
Now you can add HT and see it heat up, if your sigma conductance is T dependent you will get R(T), and if you add/replace EC by MEF you can get inductance included for a given frequency<br />
<br />
It should be rather straihtforward, no ?<br />
<br />
--<br />
Good luck<br />
IvarFri, 15 Mar 2013 18:09:54 +000035497.1363370994.98177Re: Resistivity change vs deflection
http://www.comsol.com/community/forums/general/thread/35497/#p98152
Hi Dear Ivar,<br />
First of all I thank you so much for your answer. I simulat the deflection of the membrane but for calculating the resistivity of a resistor is there any example in COMSOl 4.3? <br />
<br />
regardsFri, 15 Mar 2013 10:25:31 +000035497.1363343131.98152Re: Resistivity change vs deflection
http://www.comsol.com/community/forums/general/thread/35497/#p98107
Hi<br />
<br />
normally you can get impedance info from the defalt lumped port/terminal variables, and for the deflection you must define as a new variable with i.e. an integration of a point, or an average (coupling operator) over a bondary (often cleaner).<br />
<br />
Then solve for a parametric seep such to scan your stress levels / displacements, and use a line plot of the resistance with a user defned x axis expression corresponding to your deflection.<br />
<br />
You can also do it by plotting a table filled from a few derived variables, by using anual selction of columns<br />
<br />
--<br />
Good luck<br />
IvarThu, 14 Mar 2013 20:11:44 +000035497.1363291904.98107Resistivity change vs deflection
http://www.comsol.com/community/forums/general/thread/35497/#p98085
<br />
dear all,<br />
<br />
How to plot the resistivity change of a simple piezoresistor vs deflection of a membrane in a MEMS sensor?<br />
<br />
thanksThu, 14 Mar 2013 15:41:06 +000035497.1363275666.98085