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[Anton Gladky <question248996@xxxxxxxxxxxxxxxxxxxxx>]

Question #248996 on Yade changed:
https://answers.launchpad.net/yade/+question/248996

Anton Gladky proposed the following answer:
I do not know, what is wrong, here is my data-file.
Before iteration 14580 there is no penetration/force,
they are both 0.0.

Anton

==============================================
==============================================

# FnCalculated        FnYade        PDgeom        it1        velZ
0.0528854137881    -0.0    0.0    14577    -0.0352569425254
0.0528927712881    -0.0    0.0    14578    -0.0352618475254
0.0529001287881    -0.0    0.0    14579    -0.0352667525254
0.0529074862881    -0.0    0.0    14580    -0.0352716575254
0.0527418052399    0.0536958685668    0.000157676455738    14581
-0.0346356153075
0.0526552110261    0.0536076956226    0.000330854532275    14582
-0.0340006255765
0.0525545767687    0.0535052266655    0.000500857660158    14583
-0.0333668589786
0.0524401838845    0.0533887482432    0.000667691955051    14584
-0.0327344827395
...
...
...
0.000843280448325    0.000851162962522    0.00320248714932    14717
0.0101127701989
0.000587246526371    0.000590461193354    0.00315192329833    14718
0.0101149133102
0.000335744255672    0.000334373693617    0.00310134873178    14719
0.0101139996021
8.87675495041e-05    8.28942656184e-05    0.00305077873376    14720
0.0101100840795
-0.000156627052485    -0.0    0.00300022831337    14721    0.0101051790795
-0.000401899029474    -0.0    0.00294970241797    14722    0.0101002740795
-0.000647048381463    -0.0    0.00289920104757    14723    0.0100953690795
-0.000892075108451    -0.0    0.00284872420217    14724    0.0100904640795

Anton


2014-05-21 17:26 GMT+02:00 Andy Torres <question248996@xxxxxxxxxxxxxxxxxxxxx>:
> Question #248996 on Yade changed:
> https://answers.launchpad.net/yade/+question/248996
>
> Andy Torres posted a new comment:
> OK! maybe im missing something here, but I think we almost have it!
>
>>If you look at the blue line (normal force), it is always 0, when
>>there is no penetration.
> is that right? if you check the plot you gave me, Fn start growing from iterN 14520, but the PD is negative until iterN 14600. Shouldn't be start changing all together?
>
>>> its posible to see that the force is actually acting over the particle, because the velocity
>>> also change before the particles make contact.
>>Sure, you have a gravity there.
> yes, true, i was not clear here, the Vel under gravity, should be linear, but in this case is not.
>
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