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[Klaus Thoeni <question214773@xxxxxxxxxxxxxxxxxxxxx>]

Question #214773 on Yade changed:
https://answers.launchpad.net/yade/+question/214773

    Status: Open => Answered

Klaus Thoeni proposed the following answer:
Hi Christian,

you should have a very close look at the force distribution over time during 
an impact. You can zoom into your plots (now in your plots the impact is just 
a line but if you zoom in it should become a curve - make sure iterPeriod=1) 
and you will see that the contact time will not be the same as other people 
already mentioned. 

Klaus

On Thu, 22 Nov 2012 04:11:12 AM Christian Sommerfeld wrote:
> Question #214773 on Yade changed:
> https://answers.launchpad.net/yade/+question/214773
> 
>     Status: Answered => Open
> 
> Christian Sommerfeld is still having a problem:
> Hi guys,
> 
> @Eugen: Thanks! Your summary explain exactly whati mean.  Sorry for the
> bad formulated question!
> 
> Ok this makes sense. If you use the kinetic energy conservation and
> momentum conservation  than you get the same velocity and the same
> position. Thank you very much Jan!
> 
> First i though if you add the forces to the newton law there will be a
> much higher velocity after the contact when using the law of cundall &
> strack. So now i understand what the laws are doing. Every contact law
> affects the time of actual contact what affects the position and the
> velocity of the motion. And for a short time of actual contact the
> impact of different laws isn't that high.  This explains the behaviour
> for t>0.45 where the impact of the contact law is much higher. Hopefully
> i understand it in the correct way?
> 
> Cheers,
> 
> Christian

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