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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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integral

Posted 2013年4月22日 GMT-4 04:00 Materials, Parameters, Variables, & Functions, Results & Visualization, Studies & Solvers, Structural Mechanics Version 4.3a 1 Reply

Tarik Madani
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hi

do you know if it possible to calculate this integral in comsol (attach file) ?

thanks

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1 Reply Last Post 2013年4月26日 GMT-4 08:26
Fabio Greco
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Posted: 1 decade ago 2013年4月26日 GMT-4 08:26
Hi Tarik,

you have to define two integrals: go to Model>Definitions>Model Couplings>Integration. Do this two times (you have two integrals), so you get intop1 and intop2 that you define as surface integrals.
Then set in Results>Derived Values>Global evaluation your equation, that is: sqrt(intop1((e_xx-e_yy)^2)/intop2((tau_xx-tau_yy)^2)).

I hope this helps!

Fabio
Hi Tarik, you have to define two integrals: go to Model>Definitions>Model Couplings>Integration. Do this two times (you have two integrals), so you get intop1 and intop2 that you define as surface integrals. Then set in Results>Derived Values>Global evaluation your equation, that is: sqrt(intop1((e_xx-e_yy)^2)/intop2((tau_xx-tau_yy)^2)). I hope this helps! Fabio

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