Sfiligoy
Guest
Good evening and good weekend.
They're at first with ansys.
for the realization of a prototype, I am studying on ansys wb the following asymmetric geometry: a cylindrical vessel excavated (a pot :biggrin
in plastic material (abs) with above (the lid :biggrin an elastomeric membrane (tpe) of constant thickness, connected to the container by ultrasound welding. (in fact, we could also make it laser)
inside the container will develop an internal pressure and above the membrane will act a weight. the goal is to determine the shift of the elastom.
made the overview of the problem, aware of my inexperience in ansys, I simplified the problem temporarily setting the steel container (leaving flexible) and the membrane as a rubber nbr (the constants to characterize the hyperelastic behavior of the tpe are not around, even under blackmail, but I have to do the prototype
Therefore I conscious of the differences, for the moment, starting to learn I took the coefficients of the nbr found in a thesis :frown
attached you will find the mesh performed on the model made with designmodeler.
flat quadrangular elements are linear (on the guide I read that the choice "linear" compared to "quad" is preferable in the non-linear field) and the contact is set to bonded, without small sliping.
ansys performs my analysis without problems, but if the shift of the central point converges (both manually refining the mesh and operating the convergence command), efforts do not converge at all.
the problem is on the contact, on the inner edge of the container between the two materials.
What can I do? the analysis takes me almost forty minutes and the student version does not allow the possibility to exceed an hour of calculation.
are very welcome tips to improve mesh.
two questions for experts:
1) Why if I activate the convergence command, ansys forces me to suppress the mesh connection command?
2) during calculation, if I click on solution information to see the force convergence and displacement convergence, I find a graph full of horizontal blue lines that do not allow me to see anything. How do they turn off? if I need to put a screenshot
Thank you very much and good weekend.
They're at first with ansys.
for the realization of a prototype, I am studying on ansys wb the following asymmetric geometry: a cylindrical vessel excavated (a pot :biggrin
in plastic material (abs) with above (the lid :biggrin an elastomeric membrane (tpe) of constant thickness, connected to the container by ultrasound welding. (in fact, we could also make it laser)inside the container will develop an internal pressure and above the membrane will act a weight. the goal is to determine the shift of the elastom.
made the overview of the problem, aware of my inexperience in ansys, I simplified the problem temporarily setting the steel container (leaving flexible) and the membrane as a rubber nbr (the constants to characterize the hyperelastic behavior of the tpe are not around, even under blackmail, but I have to do the prototype
Therefore I conscious of the differences, for the moment, starting to learn I took the coefficients of the nbr found in a thesis :frownattached you will find the mesh performed on the model made with designmodeler.
flat quadrangular elements are linear (on the guide I read that the choice "linear" compared to "quad" is preferable in the non-linear field) and the contact is set to bonded, without small sliping.
ansys performs my analysis without problems, but if the shift of the central point converges (both manually refining the mesh and operating the convergence command), efforts do not converge at all.
the problem is on the contact, on the inner edge of the container between the two materials.
What can I do? the analysis takes me almost forty minutes and the student version does not allow the possibility to exceed an hour of calculation.
are very welcome tips to improve mesh.
two questions for experts:
1) Why if I activate the convergence command, ansys forces me to suppress the mesh connection command?
2) during calculation, if I click on solution information to see the force convergence and displacement convergence, I find a graph full of horizontal blue lines that do not allow me to see anything. How do they turn off? if I need to put a screenshot
Thank you very much and good weekend.
