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Shells with bonded contacts

Question asked by Jim Wisén on Oct 23, 2008
Latest reply on Nov 9, 2008 by Jim Wisén

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Which is the best way to apply a bonded contact between two shell elements?

I have used split lines to make a silhouette of the contact area on the other part, and I'm using the same mesh size on both components. I thought that by doing this, the bonded areas would have the exact same mesh, and therefore make a good contact. Im still getting a strange, non-smooth stress concentrations. What have I done wrong?

I also got a new error several times:
warning: Ratio of clearance/element size in at least one element is larger than 1
Do you wish to continue?

What is causing this error? Changing the element size often fix this.

Best regards

Jim Wisén

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Jim Wisén Oct 29, 2008 6:01 PM

I would really appreciate if someone could help me. Thanks

//Jim

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Derek Bishop @ Jim Wisén on Nov 4, 2008 12:57 PM

I normally select the two faces to add a bonded contact. Sometimes I use a face and edge. Both seem to work. I would not normally add a split line to a face. Remember to select node to surface when defining the contact.

The gap looks large relative to the stress contours on the model and this is likely to be the reason for the error message. This warning may indicate the clearance is excessive.

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Jim Wisén @ Derek Bishop on Nov 9, 2008 12:16 PM

Thanks for your answer!

How do I select node to surface with bonded contact? I dont have that choice with bonded contact, only with no penetration contact.

The distance between the parts seems bigger because its a exploded view to show the spots with high stress. They are touching.

//Jim

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Jim Wisén Oct 29, 2008 6:01 PM
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I would really appreciate if someone could help me. Thanks

//Jim
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- Derek Bishop @ Jim Wisén on Nov 4, 2008 12:57 PM
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  I normally select the two faces to add a bonded contact. Sometimes I use a face and edge. Both seem to work. I would not normally add a split line to a face. Remember to select node to surface when defining the contact.
  
  The gap looks large relative to the stress contours on the model and this is likely to be the reason for the error message. This warning may indicate the clearance is excessive.
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  - Jim Wisén @ Derek Bishop on Nov 9, 2008 12:16 PM
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    Thanks for your answer!
    
    How do I select node to surface with bonded contact? I dont have that choice with bonded contact, only with no penetration contact.
    
    The distance between the parts seems bigger because its a exploded view to show the spots with high stress. They are touching.
    
    //Jim
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Shells with bonded contacts

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