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4 wheel motion study

Question asked by Corey Blauch on Apr 20, 2012
Latest reply on May 1, 2012 by Corey Blauch

I was conducting a motion study where a vehicle with four wheels on the ground is going full speed but then comes to an immediate halt. It is front wheel drive and I have put in the appropriate values for deceleration on the front wheels.

 

I'm interested to see how far the vehicle will skid so I put in the appropriate values for friction on each of the four contacts.

 

However, the calculation stops instantly with friction on all four wheels. But, if I remove friction, the calculation does work and vehicle does skid.

 

My question is: why can't I have friction on the rear wheels? I would like to have it because the stopping distance should be more acurate.  I believe I have everything mated and contacted correctly. Am I somehow over confining it?

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