calibration of cohesive model

Hi Reza,

Generally speaking, I think every DEM user has to perform such task, and there is usually no exact relationship or charts you can use because the macroscopic behavior is highly packing-dependant (in addition to being micro parameters-dependant). Thus 2 different users with the same micro parameters could get different macro parameters..

In order for you to get more helpful answers, I'd advice you state clearly which contact law you're using: is this "cohesionFriction" material in fact "cohFrictMat" [1] ? with "CohFrictPhys" as interaction physics, and "Law2_ScGeom6D_CohFrictPhys_CohesionMoment" as contact law ?

Finding papers where your law has been used would also obviously be helpful, you have a couple of references in the doc of Law2_ScGeom6D_CohFrictPhys_CohesionMoment [2]

Jerome

[1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.CohFrictMat
[2] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom6D_CohFrictPhys_CohesionMoment

thanks Jerome,

Yes I am using same material, Ip functor and law1 functor that you mentioned, I read some papers about calibrating DEM model, which were done by PFC. they used some experiment like unconfined compressive test or tensile test, fracture toughness test etc. for calibrating, however they did not mentioned the procedure. I want to know if there any specific procedure for Yade users to follow and calibrate their models?

you mentioned that calibrating is packing-dependent. it means that if I use same packing procedure I have to save my particle assembly and use that for calibrating?

No, from my point of view there is no Yade-specific procedure to calibrate a Yade model.
As with PFC or any other code, the idea is to realize simulations that exhibit the macro-scale quantities of interest, playing with micro-scale parameters until the macro-scale quantities have the values you want.

During this "procedure", yes you need to work with a "given" packing. In fact sticking to the exact same saved assembly is probably not required (though I find it convenient), but at least you should always have similar packings in terms of porosities, isotropy, and so on..

Thanks Jerome...I will work on that...