Learning Forum

[matteom]

Hi, I need some help about a problem I'm trying to solve in APDL.nnThe problem I'm facing is divided in two part:n1. study the interference fit of a cylindrical pin inside a bushingn2. study the resulting structure when constraining the bushing and applying a load to the pin I would like to separate the two analyzes in such a way as to be able to apply the constraints to the bushing only after the pin has been mounted inside.nIn APDL, I tried to split the two analyses using two loadsteps (using the TIME command), in the first I solve the contact and in the second I applied both boundary conditions and loads, but this doesn't seem to work and I obtain the seame results as I would run the two analyses in a single step.nSo I'm looking for some tips/advice in order to solve thes problem. Thanks everybodynnMatteon

[1shan]

Hello Array,nCould you add pictures of your result and tell me what differences are you expecting? Could you also have a look at the tutorial pressfit in a plate /courses/index.php/courses/contact-mechanics/lessons/homework-quizzes-simulation-examples-contact-lesson-5/. It is performed in workbench but you could have a look at the results, to understand what to expect.nRegards,nIshan.n

[matteom]

Hello @matteom,Could you add pictures of your result and tell me what differences are you expecting? Could you also have a look at the tutorial "pressfit in a plate" /courses/index.php/courses/contact-mechanics/lessons/homework-quizzes-simulation-examples-contact-lesson-5/. It is performed in workbench but you could have a look at the results, to understand what to expect.Regards,Ishan./forum/discussion/comment/108252#Comment_108252

Hi 1shan, thanks for your reply.nIn the picture below you can see what I wolul like to simulate, I'm looking for a procedure, if any, to break down the analysis into two step.nn

[ErKo]

We can have two steps - one to resolve the interference and the second where we apply the additional load.nnThis video shows how to do what you want (they only difference is that you will apply a force instead of a displacement in the second step).nhttps://www.youtube.com/watch?v=5jH2Ox6-YkUnnAlso this course should be very helpful.n/courses/index.php/courses/contact-mechanics/nErik

[matteom]

Thanks nIs it possible to apply the fixed support on the deformed geometry only after the first step has been solved? If so, how can i do that?n

[ErKo]

you are more than welcomennIf you now also want to apply the fix support on the second step in the deformed configuration then this will help:nArraynArraynAll the bestnnErikn

[matteom]

thanks again for your help. nI solved the problem using the commandnD,Nodes_to_fix,ALL,%_FIX%nin the second stepn