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[Nima Goudarzi <question658905@xxxxxxxxxxxxxxxxxxxxx>]

New question #658905 on Yade:
https://answers.launchpad.net/yade/+question/658905

Hello all,

As a part of a trixal test with my own implemented model in YADE, I need to compact my sample in the vertical direction  to reach to a target void ratio. Dimensions of the sample are 3.5*3.5mm*7.1mm and it will be confined in six frictionless walls. The method of compaction is UCM and the sample will be compacted in 5 layers. As I am going to produce 100000 particles (based on a PSD), I may assume that each layer has 2000 spheres in it. Here is the sequence of compacting:
1- First layer is deposited and then compacted to a target void ratio of 0.73.
2- After depositing the second layer on top of the first layer, both layers will be compacted to reach a target void ratio of 0.71.
3- After depositing the third layer on top of the second layer, all three layers will be compacted to reach a target void ratio of 0.69.
4- After depositing the fourth layer on top of the third layer, all four layers will be compacted to reach a target void ratio of 0.67.
5- After depositing the fifth layer on top of the fourth layer, all five layers will be compacted to reach a target void ratio of 0.65.

This 0.65 is the target void ratio for the whole assembly.  

After reaching to the assembly target ratio (0.65), I need to move the top wall to produce a pressure equal to 50 kPa on top of the sample. The rest of the simulation related to design alternations for effective model parameters, applying confining pressure and finally deviatoric stress.  I am wondering if someone has the experience of modelling such phenomenon and share with me their scripts or guide me through the simulation. Any helps are highly appreciated.



Thanks so much,


Nima 




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