Contact Interaction
Contact Interaction
(OP)
I'm trying to model two blocks sitting on top of each other (learning before I use it on the real model) and want to establish an interaction so when one block displaces into the other, it makes contact it makes the second displace and form stresses. But when I try to move the first block away from the second, the program won't run, it comes up with an error. How can I model it so when it displaces into the block, the second block forms stresses but when it displaces away, a gap is created?





RE: Contact Interaction
Rob Stupplebeen
RE: Contact Interaction
RE: Contact Interaction
Regards
Martin Stokes CEng MIMechE
RE: Contact Interaction
RE: Contact Interaction
Regards
Martin Stokes CEng MIMechE
RE: Contact Interaction
With contact problems I've found that even slight changes to the model can mean success or failure. As the OP managed a solution without plasticity then the restraints being applied are correct and there is no rigid body motion.
The choice of master and slave surfaces can have an effect on the solution and the advice is that the master surface should be the harder surface. If the mesh between the two are dissimilar then choose the master surface to be the coarser mesh. If you're not sure then it's sometimes worth just switching the master/slave surfaces around to see if it will work. In the same way a contact analysis can be made to work if you modify the mesh slightly. The problem can lie with a single node that won't converge. Using the automatic tolerances option in contact controls can often make an analysis work too.
corus
RE: Contact Interaction
There's something else wrong with the block.cae file (perhaps it did not download cleanly from that file sharing site?)
RE: Contact Interaction