Mortar contact ROCKS

lamei

The new mortar contact in ccx 2.17 is definetly worth a try. Is there a way to change the contact type directly in the gui?

Why i tinkered with this:
I try to model a testprocedure ( UNECE-R58 ) of a structure with several sequential loading/ unloading steps each causing large plastic deformation on the structure. The analysis type nonlinear3d and quasi static lead to strange contact behavior ( it won't get loose in the unloading step so the structure was pulled back ) or it won't converge. That was all solved by simply changing the contact pair type to PGLINMORTAR.

What i've done ( in case you wanna try too ):
- Download ccx2.17 Win64 binray as part of https://github.com/calculix/cae
- install cygwin from cygwin.com, installed cygomp1 and cygfortran5, copy the missing dlls to the bin folder from the preceeding step

After exporting the inp file from mecway change the file according to this example ( for hard contact )
OLD:
*CONTACT PAIR,INTERACTION=SI_2,TYPE=SURFACE TO SURFACE
contactfaces,targetface
*SURFACE INTERACTION,NAME=SI_2
*SURFACE BEHAVIOR,PRESSURE-OVERCLOSURE=LINEAR
500000000000

NEW:
*CONTACT PAIR,INTERACTION=SI_2,TYPE=PGLINMORTAR
contactfaces,targetface
*SURFACE INTERACTION,NAME=SI_2
** *SURFACE BEHAVIOR,PRESSURE-OVERCLOSURE=LINEAR
** 500000000000

See CALCULIX Documentation for the several restrictions ( only for solid elements )
and this as a reference: https://opus4.kobv.de/opus4-fau/files/7198/dissertation_sitzmann_saskia.pdf


Greetings from Germany and Thanks to Victor for MECWAY!!!

Victor

Thanks for the update. I've been a bit unsure of it because Guido said something wasn't right yet. Maybe that was just the shells?