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[douk.van.werven]

Hi all, I have issues with bodies going through each other during drop test. How to setup contacts between elements to avoid these penetrations? What can be set up wrongly?

[Nanda Veralla]

 

Hello Douk,

If the geometry you use has two or more bodies in contact, a Body Interactions object folder appears by default under Connections in the tree. Included in a Body Interactions folder are one or more Body Interaction objects, with each object representing a contact pair. If this is not turned on, can you add this manually? 

For more detailed guidelines on using body interactions, please follow this link: 3.2. Body Interactions in Explicit Dynamics Analyses

This should handle contact penetrations smoothly, please let us know if this is not helping.

 

Regards,

Nanda.

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[douk.van.werven]

Hi Nanda, thank you for your input. I use the following way of working (in line with the droptest tutorial I followed). 

For interactions between the parts that collide with each other, I use the body interactions scoped to all bodies. When parts are bonded, I add a bonded contact to them. to prevent parts from going trough the floor, I also added a seperate contact propertie between them and the floor.

Is this correct way of working, or should I not use body interactions at all?

 

[Nanda Veralla]

Hello Douk,

I did a test run on a similar PCD drop-test model, the model ran smoothly without any contact penetrations. Can you share more specific details of which contact this penetration is occurring?

• Is it for all contacts or a specific contact?
• Are these automatically generated contacts by Ansys or manually specified by you? 
• Can you try removing the frictional between multiple and floor? This should be handled by body interactions by default.
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