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There is no simulation that is being run in this video. This is just a preparation video that is utilized on a later stage.

you can mail me at "avinashsajwan.jnv22@gmail.com"

I have not done that kind of study. However, i know that the difficulty will lie in defining the interface between the anchor and fill material. For these kind of problems i would suggest you to use better software such as PLAXIS or FLAC.

I know it has to be done using a handshake algorithm provided in the pfc manual. However, i was not very successful in doing that.

No, currently it is compatible with windows and linux only.

That is an extremely valid point. You cannot unless you have some other source for elevation. That is the reasin in this tutorial towards the end you dont get definitive results. The purpose of this video is to generate DEM with the help of available tools. I have further refined my DOD analysis using drone data, which is not included in this video.

It would have been better, if you could describe your issue more clearly. If you are having trouble importing data from a csv file which is more common, it might be due to the syntax which is required for proper csv file. Look for table import command in the pfc manual where you will fine three necessary condition on how to format the csv file so that it can be imported correctly.

The procedure is similar to what has been shown in the other video of rockfall simulation. Just create the cylinder, and while creating the clump particles in the bins, use the dimensional coordinates inside the cylinder. That will do it

use the "box" keyword to create the clumps with specified coordinates. Try it, if you have issues, feel free to ask.

@@engineersmania7353 ok sir

avinashsajwan.jnv22@gmail.com

""clump distribute porosity 0.15 diameter number-bins 6 box -30 30 -30 30 -30 30 ... bin 1 size 16 15 volume-fraction 0.03 group 'clump1' template 'clump1' ... bin 2 size 15 14 volume-fraction 0.12 group 'clump2' template 'clump2' ... bin 3 size 14 13 volume-fraction 0.30 group 'clump3' template 'clump3' ... bin 4 size 13 12 volume-fraction 0.4 group 'clump4' template 'clump4' ... bin 5 size 12 11 volume-fraction 0.12 group 'clump5' template 'clump5' ... bin 6 size 11 10 avolume-fraction 0.03 group 'clump6' template 'clump6'"", While using this

the error is raised as the total volume fraction sum is not 1. As seen in my code the sum of volume fraction is one. That is must as it means you know what is the amount of each group in the box, so there is no unknown material generated. If this error is coming to your script check for typing mistake.

replied

Yes you can import this terrain in PLAXIS 3D. However the adaptation required to include there is out of my scope.

Yes you can. However you need to understand the limitations of the software in terms of particle sizing, physics behind the simulation and dry or wet simulation.

yes you can. However, that will require highly advanced skills because it will require coupling of PFC and a CFD software such as openfoam. but PFC team doesn't provide any support for this coupling process, so it is hard to crack and require proper knowledge of cfd software and python scripting.

It is a proprietary software from Itasca corporation. Therefore, it is best to purchase an official copy from them, to avoid any ethical issues. However, you can submit for a trial software from them.

Since PFC is based on Distinct Element Method, there is no direct method for particle crushing. However, you have freedom in your modelling technique. You can either model it as a bonded material with small particles and parallel bond of sufficient strength and once that strength is reached the bond will fail and material will disperse, this can be treated as particle crushing or disintegration.

You don't get elevations from different dates as these elevations has been recorded from a specific mission and time periods such as SRTM etc. If you want elevations from a specific period then you will need to generate the DEM using aerial imagery or SAR Images using photogrammetry softwares.

You are most welcome

thank you.

Great suggestion!

The values of kn and ks depends on the material behavior. So it matters whether your material is similar to metals that are known to have standard range of properties or soil like material where the range of properties vary over a large magnitude. So, if its the earlier one, you can find those in literature easily. However for the later case you will need a experimental or analytical results to find a value that works for you. It is one of the disadvantages of DEM that you don't get to work with laboratory ready parameters similar to FEM and FDM. So i would suggest you find any standard test for your material and calibrate the kn and ks for that material. As an example for soil, we perform triaxial test in lab and the simulate the same in DEM and change the values of kn and ks till i get a match with the elastic modulus. I hope it helps....

@@engineersmania7353 Thank you for help me to solve my question. I'll try to do triaxial test in PFC. Could you make a video show that please, for youtube ? In fact, I´m trying simulate a rockslide in a dump and I´m using the code in PFC Examples, and I'm changing value and stl files to do that. It´s my target.

@@freddycalderonvela6409 You don't need to perform your own coding PFC supplies a special package regarding this. you can search on their website they have a special package that include everything from sample preparation to testing and calibration.

well commendable of you to notice that. As Nepal and India accounts for more than 70% of landslide events in global landslide database. However most of them are from adjoining regions of Nepal such as Uttarakhand, Himachal Pradesh etc.

Currently I am pursuing some other tasks so I will not be able to do it now. However, it is a good suggestion. I can tell you that there is an example simulation in PFC documentation, where they perform a stable simulation on the creating a tunnel face or mining in rock wall.

PFC2d AND pfc3D are products of the same installation. if you just download and install the PFC, both of its components will be installed. you don't need separate installation

You can use software such as solidwork, rhino if you have a complex geometry (so that you can import using a .stl file) otherwise if its a simple geometry, you can build it using wall commands in the PFC itself

Welcome

Yes, it is done using PFC, Yes you can do that simulation by depicting a particle interacting with a wall. There is an example of particle rebound in PFC manual, you can refer there.

@@engineersmania7353 I need to assign high velocity to ball for example 1000m/s ,Do it done with pfc?

@@fatemearvandi1382 yes it can be done with PFC, you can access the velocity property of ball and assign the value using ball.veocity FISH command or regular command ball velocity.

@@engineersmania7353 Thank you sir🙏

First understand about the DEM and the advantages and disadvantages of this numerical method. Then follow through with the tutorials and example section of PFC to understand the basics of PFC and then creatively apply those selective feature according to your own problem.

I have already made a video regarding that, using clump for rockfall. You can refer to it from the playlist section.

thank you sir..

It does not depend only on the slope angle as there are several stability and instability factors involved such as the cohesion, angle of shearing resistance, confinement. In easier words with stronger materials and stable condition you can see high degree slope as well as nearly vertical slopes also. I would advise you to read up on that.

It looks like you made some modifications to the file. If you have done so please check the sum of fractions is 1 in total. As in my file from bin 1-6 the total volume fraction is (0.03+0.12++0.3+0.4+0.12+0.03)=1. Now check yours.

You can change line 77 to this and it'll work. ： bin 6 size 11 10 volume-fraction 0.03 group 'clump6' template 'clump6'

Yes it can be done there too. But the syntax and code will change but the crus of problem remains same.

its not necessary because you have alternative as inline FISH language but to increase productivity and have complex simulation you will be better with python. The basic python which will be good enough for two weeks but might need 2-3 months for simulations involving CFD and coupling

thank you for the appreciation. It means a lot

If you are taking it seriously then you already know, it doesn't work like that.

enlighten me...

I am not a professional worker, I am a research sholar.

@@engineersmania7353 to apka research kab poora hoga??

@@engineersmania7353 to aap sey baat apki research poora honey key baad hee ho sakta hai😇😇????

I have just started my Ph.D.(2020) and fortunately it will be over by 2025.

Its already there in the govt. portals known as landslide susceptibility maps. but these are dynamic failures which can be pretty hard to predict.

@@engineersmania7353 universe🌌 ka mimic karwavo solution🔬😇📈 milega Poora future🔮 dikha jayega Kyonki kaliyug main sabko brahmagyaan ho jayega😇 jo unlimited universe infinity universe ko bhi jaan lega Bhagwaan bhi phir anjana nahin raha jayega😇😇😇 Kaliyug main bhagwaan ko pana bhi sahaj ho jayega😇😇😇 Ramayan main sab likha hai😇😋😇

@@engineersmania7353 tum mere research karwavo sara brahamand ka hisab mil jayega😇😇😇

let me first do mine....

@@engineersmania7353 tum bhi merey jaisey nikley Pahaley main to kar loon 😁😁😁😁😁😁😁

yes. i do know that. its one of my earlier videos, after which improvement has been done.

The characteristics are portrayed in a sense so that its for beginner level as well does not misrepresent the facts.

Thank you. The files are already uploaded in the another tutorial video titled "Landslide/Rockfall simulation using PFC(Itasca)" on this channel only. Please go through it.

Thank you for your appreciation.

Thank you...

Thank you