Fixed Displacement in positive/negative direction

[dr2234]

Hi,

I want to fix a face (simulating a support) in a specified direction. The support is free to move in the +ve x and y direction, but not free to move in the -ve x and y direction. The support is also fixed in the z direction.

See attached image....

In ANSYS i can only see how to fix a displacement (by setting it to zero) in both the positive and negative directions at the same time.

Is there a way of doing this? Using springs perhaps?

Thanks.

 

[Drej]

You could use springs with different axial properties, or you could use the good ol' fashioned gap element (contacts) method.


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[dr2234]

Is it possible to do this?

I have put a spring on the in the x and y direction and that spring acts longitudinally - therefore if i then apply a force to the opposite side, the sping will compress by the same amount it will extend. So this isnt really doing much better than having a fixed displacement!!

 

[Drej]

You need to have a bi-directional spring with different compressive/tensile properties. Check the element library for COMBIN39.


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