Excellent video presentation. I wanted to ask you how I can develop that example manually since I have problems when performing the material nonlinear matrix and geometric nonlinear matrix. If you could explain with a video I would be infinitely grateful. Regards
I'm really glad that you like in Manu. To be honest with you, I have absolutely no idea how to do this manually... I mean, this is why you want to have a nonlinear solver in the first place, right? I can only imagine that doing this "by hand" would be super tedious and iterative... if I recall there were around 500 iterations when I was computing that. It's a super small model, so it took my PC a few minutes max to compute this... but doing that manually... I can't even imagine that. And if you would like to code a nonlinear solver of your own, that is a complex thing I guess - I never tried it, so I won't be able to help you with this.
thank you @@Enterfea for answering, could you recommend me a literature that shows how to perform this analysis, because I am trying to analyze a shell vault and I want to program in matlab. thank you in advance for your time.
@@manu3308 not really my thing, but I think that Crisfield vol 1 and vol 2 had some coding snippets for nonlinear solver (I'm not 100% sure though). I always refer to the book as Crisfield (name of the author) the title is something like nonlinear analysis of solids and structures. Maybe you will find it there, but I don't think they used matlab there.
Hey! This is a very good question. I'm not an Ansys user, but from what I've heard, there is nowhere in the Workbench where you can "click" the arc-length! You have to add that from the command line into the analysis file, but sadly I don't know the Keyword in Ansys that "operates" Arc-Length
Hi Thank you for the video! It would be great if you could do this case experimentally and show the correlation between the model and the real thing! Maybe it is too much to ask but it would be an awesome video!
Hi Lukasz. This video is great. Thanks for sharing. By the way, I wonder what type of nonlinear algorithm you have implemented in this simulation. Classical Newton-Raphson? Or a quasi-Newton method? Thanks!
Hey Gaston... I'm pretty embarassed, as I completelly missed your comment (I don't get notifications sometimes I think...) sorry for that! I used arc-length method here (I think it was modified riks, but it was so long ago... maybe Crisfield? they work almost identical). And I think it was "full Newton Raphson". Hope this helps :) Ł
hi. i have a problem with snap-through problem using MArc Mentat (transient analysis). i need to switch from two stable shapes using a incremental load. but when i remove the load, the plate go back at the first configuratio. why?
Hey Gio! I'm not sure if I understand you correctly... what kind of structure are you analyzing? I know you can't post pictures here (or so I think) so you can easily send me an email about it (enterfea@enterfea.com). Maybe I will be able to help you. Talk to you soon :)
Excellent video presentation. I wanted to ask you how I can develop that example manually since I have problems when performing the material nonlinear matrix and geometric nonlinear matrix. If you could explain with a video I would be infinitely grateful. Regards
I'm really glad that you like in Manu. To be honest with you, I have absolutely no idea how to do this manually... I mean, this is why you want to have a nonlinear solver in the first place, right? I can only imagine that doing this "by hand" would be super tedious and iterative... if I recall there were around 500 iterations when I was computing that. It's a super small model, so it took my PC a few minutes max to compute this... but doing that manually... I can't even imagine that. And if you would like to code a nonlinear solver of your own, that is a complex thing I guess - I never tried it, so I won't be able to help you with this.
thank you @@Enterfea for answering, could you recommend me a literature that shows how to perform this analysis, because I am trying to analyze a shell vault and I want to program in matlab. thank you in advance for your time.
@@manu3308 not really my thing, but I think that Crisfield vol 1 and vol 2 had some coding snippets for nonlinear solver (I'm not 100% sure though). I always refer to the book as Crisfield (name of the author) the title is something like nonlinear analysis of solids and structures. Maybe you will find it there, but I don't think they used matlab there.
How to use Arc length method in Ansys Workbench Static structural 2018 , ( Basically how to do non-linear buckling analysis in ansys workbench )
Hey! This is a very good question. I'm not an Ansys user, but from what I've heard, there is nowhere in the Workbench where you can "click" the arc-length! You have to add that from the command line into the analysis file, but sadly I don't know the Keyword in Ansys that "operates" Arc-Length
Hi
Thank you for the video!
It would be great if you could do this case experimentally and show the correlation between the model and the real thing! Maybe it is too much to ask but it would be an awesome video!
Hey Pedro!
It's undoable right now, as I don't have the gear... but there are secret plans...
Hi Lukasz. This video is great. Thanks for sharing.
By the way, I wonder what type of nonlinear algorithm you have implemented in this simulation. Classical Newton-Raphson? Or a quasi-Newton method? Thanks!
Hey Gaston... I'm pretty embarassed, as I completelly missed your comment (I don't get notifications sometimes I think...) sorry for that!
I used arc-length method here (I think it was modified riks, but it was so long ago... maybe Crisfield? they work almost identical). And I think it was "full Newton Raphson".
Hope this helps :)
Ł
hi. i have a problem with snap-through problem using MArc Mentat (transient analysis). i need to switch from two stable shapes using a incremental load. but when i remove the load, the plate go back at the first configuratio. why?
Hey Gio!
I'm not sure if I understand you correctly... what kind of structure are you analyzing? I know you can't post pictures here (or so I think) so you can easily send me an email about it (enterfea@enterfea.com). Maybe I will be able to help you. Talk to you soon :)
@@Enterfea i sent it now :)thks