Kinematic Coupling and Boundary conditions can be applied together? 1

[Rameel]

Hi,
I am Ali and new to abaqus.I want to know that is it possible to apply coupling and boundary conditions together on the same nodes?
I want to apply kinematic coupling on four surfaces of a cube and boundary conditions on rest of two surfaces.

Please help me out.
Thanks in advance

 

[corus]

You'll probably get a warning or an error about missing degrees of freedom on the edges where two conditions apply. Deselect those edges when creating the sets to avoid it.

Tata

 

[Rameel]

Thanks Tata for your reply

Ya i got same warning,
but i want to apply both conditions on all nodes.

I am working on composite, i have a cubic block and i applied displacement Bc in +U1 direction and also applied BC in -U1 direction as u1=0. Now fiber and resin deforms differently because they have different stiffness, now i want that deformation should be same in both resin and fiber.

Could you please suggest me any other possibility to do this job

Regards

 

[corus]

Use the *equation to make the displacement the same by linking the degree of freedom of a set of nodes with 1 node on that surface. It sounds like a generalised plane strain problem though so look at doing it in 2D if at all possible.

Tata

 

[Rameel]

Corus thanks for your help
I applied equation and it worked

 

[Rameel]

Hi Corus,

I am applying tie constrain on two surfaces of my cube, but i am getting these warning,
Would you please help me why i am getting these warnings

For *tie pair (assembly__pickedsurf264-assembly__pickedsurf263), adjustment was specified but no node was adjusted more than the adjustment distance = 2.22000e-16.

Slave node 1 instance unit cell-1 will not be tied to the master surface assembly__pickedsurf263. The distance from the master surface is greater than the position tolerance value.



Slave node 8 instance unit cell-1 will not be tied to the master surface assembly__pickedsurf263. The distance from the master surface is greater than the position tolerance value.

Slave node 9 instance unit cell-1 will not be tied to the master surface assembly__pickedsurf263. The distance from the master surface is greater than the position tolerance value.

Slave node 10 instance unit cell-1 will not be tied to the master surface assembly__pickedsurf263. The distance from the master surface is greater than the position tolerance value.



609 nodes are either missing intersection with their respective master surface or are outside the adjust zone. The nodes have been identified in node set WarnNodeMissMasterIntersect.


thanks