Hi,
I am looking for the steps needed to reuse a deformed hyperelastic shape with stress results created in response to a prescribed displacement, for a second simulation with new boundary conditions.
In Comsol website they detailed, only, the deformed shape without integrated the stress results.
Any help will be so appreciated not only for me, cause this question is frequently asked and no answer is proposed.
Thank you in advance,
Hi Montassar,
Go to your second study -> step 1 -> Values of dependent variables -> Values of variables not solver for; then choose the solution of study 1.
After this you should be able to use variables that were predefined for the physics of your first study on your second study. For example, if your first study is an electric problem you should be able to use the total power density loss (defined in comsol as "ec.Qh") after you run the simulation in your second study just by refering to that variable. You have a list of comsol variables for each physics in COMSOL's users guide.
Best regards,
Nichal
Hi Montassar Akrmi,
I think that you already have found the answer for "just" the deformed geometry. In my case, luckily, I only used the deformed geometry in another simulation without having to use the calculated stresses. That makes me curious to know how the new physics and boundary conditions are different in the new simulation. If I know, I may have an opinion.
Best,
Shayan Davani
Hi Nichal and Shayan
As you said Shayan regarding the distorted geometry which is detailed on the official website of Comsol. And I think you've already taken a look at it and see their discussion about a second step to using residual stress, and even with my comment recently, they didn't respond and it makes me think that Comsol is not in able to do this type of work.
Anyway, my inquiry is to change the displaced face to be fixed, then take another face to apply a new external force, taking into account the residual elastic stress of the first simulation.
Nichal I have already read your answer and tried, but I did not get reasonable results or changes.
Thank you for your efforts,
So, you are saying that one face is displaced and as a result your sample gets stretched, then that face will be fixed and a force will be applied to another boundary. It sounds like a problem with transient boundary condition. If it is the case, you can combine or "concatenate" the two study steps in COMSOL. You can find an example of it here:
https://www.comsol.com/blogs/how-to-manage-multiple-solutions-in-comsol-multiphysics/
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