Separating Contact Result

Yaw Fang
Yaw Fang Altair Community Member
edited May 28 in Community Q&A

Hi all,

Wanna ask for the reactions of the separating contact.
I am trying to get the reaction force on the wheels (represented by blocks).
Below is my setup, and force is applied onto the cantilever.
image

1. From the displacement in Y, the blocks at the front actually sink below the rigid ground.
But why would it be?
Shouldn't it be the separating contact only allows the blocks to separate from ground, which is going upwards?
And I made the ground and the blocks rigid bodies, which they shouldn't deform.

image

 

2. Why from the slippage and normal traction contact response, my front block only has one line that is having complete opposite result?
Shouldn't it be the whole surface having the same since the blocks are in rigid bodies?
image

image

 

Attached is the close up image of the blocks deformation.

image

 

3. Are we able to specify the direction of the separating contact?
As although I am setting the contact as separating, my gate still passes through the stopper.

 

imageimage

 

 

 

Thanks in advance.

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Answers

  • Girish Mudigonda_21018
    Girish Mudigonda_21018
    Altair Employee
    edited March 2023

    It is not clear from the images, but if the separating contact is defined between the structure and the blocks, the results look expected with the bending loads applied.

    Separating contact acts like a nonlinear contact with zero clearance, so it is assumed the parts are connected at the beginning of analysis, but can move away from each other if the load is applied appropriately.

    If the model can be shared, we can take a closer look.

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