error while using MPC formulation..

[ISBind]

Greetings everyone

I was doing structural analysis of simple problem having bonded connection using MPC formulation having asymmetric behavior but I am keep on getting following error

" one or more MPC contact region or remote boundary condition may have conflicts with other applied boundary condition or other contact region"

What can possibly be reason for this and how to eliminate it.

Regards

 

[lamboram]

You contact boundary might have BC over-constraint.

 

[ISBind]

Thanks for replying

What it mean by over constraint.

Is there any way to check that as there are lots of contact involved???

Regards

 

[lamboram]

some examples of Over constraint

conflicting BC in a same place/node/element/contact
values exceeding a particular value (problem dependant)

in your case I need to know what exactly you are simulating to give an opinion. Are you simulating Shells? if not MPC formulation is really not needed. Normal Lagrange or Penalty would do. MPC is very sensitive. Why assymetric contact? is it absolutely necessary?

Cheers,
Ram