Dear all,
Sry for posting this topic again. However, i've meet problems when simulating powder compaction. The following parameters is what i have i used
Elastic : Young modulus 40
Poisson Ratio 0.35
Plasitc : Drucker Prager angle of friction 33
Dilation angle 0
Flowstressratio 1
Drucker Prager Hardening Yield stress 65 Abs plastic strain 0
70 0.38
80 0.39
100 0.405
110 0.447
I used a simple cylindrical model with fixed boundary condition at the bottom and the side to prevent all D.O.F except the Vertical direction. From the simulation result, it seems that the model doesnt harden as it was being compacted. A mere 35kN Force applied can compact it to half the initial height while experimental work done is more than 75kN.
I figured that the Young Modulus does not change when it was being compacted when it suppose to change. Is there any way to simulate this without using any subroutine?
It is really urgent. I hope anyone can help me out. thanks.