Hi everybody I have some problems on YADE at the moment. I'll try to make it clear.
I did an experimental oedometric test on a metal powder with a very low punch stress (~5MPa). Metal powder for gears manufacturing are usually pressed up to ~900MPa. So I expect there is no plastic deformation of the grains in my case. I wanted then to reproduce this with an elastic Contact Law on YADE (with "Law2_ScGeom_FrictPhys_CundallStrack()") The numerical results show a higher volumetric density than experimental measurements (that was expected ...) but also forces around 2000 times too important. I checked the following: * Units of my parameters * Unbalanced force (to remain quasi-static) * Number of particle (from 200 to 2000 and soon to 10000) * Change initial volumetric density with friction or clumps * Reduce the velocity of the upper punch * Reduce by 1000 to 3000 times the Young Modulus >From all the things I checked, the sole way to obtain numerical forces near >the experimental ones was to reduce the Young Modulus by 2000 or 3000 times. My current problem is that I can't justify such a result. Do you have an explanation on how to justify this or some tips on what could be checked? Thanks Benoit
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