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Displacement between parts in contact study while coefficient of friction is sufficient

Question asked by Pieter Bartlema on Apr 18, 2013
Latest reply on May 17, 2013 by Jared Conway

I would like to receive some feedback on the following subject. How handles solidworks contact sets including friction ?

 

We are analysing a engine bracket in contact with the engine rail. (non-linear contact study), it seems that there is displacement between the contact faces  that I would not expect based on the coefficient of friction and normal force. This has major influence on the loading path.

 

Bracket Half.JPG

 

I made a very simple model to see how SW handles contact including friction:

 

*2 blocks.

*fix displacement on bottom face.

*-100 kN vertical force applies at solution time 0 to 0.1, 0.1 to 1 kept constant

* 15 kN traverse load linear increasing from solution time 0.1 tot 1

* Surface to surface contact set, coefficient of friction 0.15.

Displacement X.JPG

Contact force.jpg

 

I am confused to see a jump in displacement(see image) between the contact faces while the coefficient of friction is not exceeded(see result force image).

 

Your Feedback is highly appreciated.

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