I want to connect tet meshed bodies together using glue elements for modal and static analysis. Can the free face of the elements in each region be use for the connection or only entire elements?
I want to connect tet meshed bodies together using glue elements for modal and static analysis. Can the free face of the elements in each region be use for the connection or only entire elements?
There is not generally any benefit to picking a subset of the component as the contact region. The contact algorithm is efficient... we usually recommend just defining the full individual component as a single contact body. Do this for each component/body. But when it comes to TET elements in contact, you must NOT use only the elements at the 'face' of the body, as this can mess up the contacting 'normal' direction... it is always best to use at least a few layers of elements... but again, just use the whole component and this issue is avoided.
I have only used the defined region method. Are there any articles I can read up on the contact body pairing? Also, I am working with optical lenses and the mesh is fairly large.
There is a LOT of material on doing contact... sometimes it is simple, sometimes it is difficult... always model dependent.
I'll point you to a bunch of material, and you can take a look. I suggest opening Technical Support cases for specific questions rather than using the Forum.
These are all webinars (the first one is on contact body pairs, using the newer approach):
oops, pretty old, but the right version for the "new" contact definition in Nastran. Check in the 2013.1 release guide the chapter "Contact User Interface Improvements (2013.1)"
This is an extract of a 3 solid tetmesh example that should work in 2013.1. Btw, "bctable1,0" is required to get the initial contact status as result case.
I have attempted to implement glued contact with solid tet mesh bodies, although I get an error on nearly every BCBODY set : "No supported elements have been found in the deformable contact body....". FEMAP is writing out the tet elements on BSURF cards.
There seems to be a pattern the errors, only the BCBODY entries corresponding to my lenses are causing FATAL errors, the epoxy bonds seem to be accepted by NASTRAN.
