Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Point constriant in Weak Form PDE (elasticity problem)
Posted 9 juin 2016, 01:40 UTC−4 1 Reply
Please login with a confirmed email address before reporting spam
Dear all,
I try to solve the beam pure bending problem using weak PDE formulation of elasticity. I've got a problem with boundary conditions. The loads are self equilibrated. Therefore I need to eliminate only the rigid body motions. I use the symmetry conditions in the beam axis direction and in the lateral direction (the model is the one quarter of the beam). But I can't find how to eliminate the vertical translation without stress concentration. As I understand it, I need to use the point constraint. But Pointwise Constraint, Weak Constraint or Weak Contribution in the single point don't work (Returned solution is not converged).
Could You help me please!
I try to solve the beam pure bending problem using weak PDE formulation of elasticity. I've got a problem with boundary conditions. The loads are self equilibrated. Therefore I need to eliminate only the rigid body motions. I use the symmetry conditions in the beam axis direction and in the lateral direction (the model is the one quarter of the beam). But I can't find how to eliminate the vertical translation without stress concentration. As I understand it, I need to use the point constraint. But Pointwise Constraint, Weak Constraint or Weak Contribution in the single point don't work (Returned solution is not converged).
Could You help me please!
1 Reply Last Post 9 juin 2016, 04:20 UTC−4
Please login with a confirmed email address before reporting spam
Posted:
8 years ago
I think I've got it by myself
It should be used the Pointwise constraint for the vertical traslations of the whole edge in the centre of the beam (but not for the single point). And it works now!
It should be used the Pointwise constraint for the vertical traslations of the whole edge in the centre of the beam (but not for the single point). And it works now!