Usage of contact planes to model a special boundary condition
Hi,
for my linear elastic problem (3d, with a fixed button or top region and some forces on the other side) I want to define another special condition:
The condition is given by a direction as a normal vector of a 2d plane. Now I want to prevent node movement in that direction.
I saw in the examples that I cannot use the essential boundary conditions, because I am blocking an arbitrary direction and not a dimension (x, y, z). The idea is now to use a contact plane instead. Is that a good idea for defining this condition?
Thank you for your help.
Is it probably a better idea to use the LCBC condition with the kind 'normal_direction'. Could you provide an example how this could be defined? As far as I understand the explanation about lcbc kind normal direction it means the velocity is bound to the normal direction. In my case I would like to define the opposite, which is not allowing the movement in the direction of the normal vector. Thank you.
Regards, Kathrin
Hi Kathrin,
Maybe you can adapt [1] for your purposes - it allows a general LCBC in each node.
r.
[1] http://sfepy.org/doc-devel/examples/linear_elasticity/nodal_lcbcs.html
On 03/03/2017 08:49 PM, kathrinsbriefkasten via sfepy-devel wrote:
Is it probably a better idea to use the LCBC condition with the kind 'normal_direction'. Could you provide an example how this could be defined? As far as I understand the explanation about lcbc kind normal direction it means the velocity is bound to the normal direction. In my case I would like to define the opposite, which is not allowing the movement in the direction of the normal vector. Thank you.
Regards, Kathrin
Hi Robert,
this is working. Thanks a lot.
Regards, Kathrin
Am Freitag, 3. März 2017 21:47:07 UTC+1 schrieb Robert Cimrman:
Hi Kathrin,
Maybe you can adapt [1] for your purposes - it allows a general LCBC in each node.
r.
[1] http://sfepy.org/doc-devel/examples/linear_elasticity/nodal_lcbcs.html
On 03/03/2017 08:49 PM, kathrinsbriefkasten via sfepy-devel wrote:
Is it probably a better idea to use the LCBC condition with the kind 'normal_direction'. Could you provide an example how this could be defined? As far as I understand the explanation about lcbc kind normal direction it means the velocity is bound to the normal direction. In my case I would like to define the opposite, which is not allowing the movement in the direction of the normal vector. Thank you.
Regards, Kathrin
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kathrinsb...@googlemail.com
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Robert Cimrman