Hello All,
I would like to impose periodic BC to my linear elastic system (2D). I need
the *derivative* of one component of the displacement field to be equal on
respective edges, i.e. {u_y},x on left = {u_y},x on right. ,x denotes
partial derivative along x and u_y is the y-component of the displacement
vector u.
I know that there is no brick responsible for this in GetFEM, so I kindly
ask for some help. I would expect it to be done with the use of additional
system of Lagrange multipliers. Is that correct?
Thanks in advance
Artur Pozniak
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