Post Processing

Hello guys,

I am new in LIGGGHTS universe and I was wondering if is possible to export results for Code_Aster.
I need to simulate material deposition in a bucket truck and then analyse the plastic response of the structure in Code_Aster.
Is it possible? If not, can I write something to do this task?
I thought write a c++ module, compile this with LIGGGHTS and then call the module with a command like "dump custom/med".

Thanks.
Daniel Oliveira

Hi all,

Hi everyone,

I tried to run my simulations in liggghts and open it in Paraview. I tried to modify the dump file using custom/vtk and I tried to install the liggghts plugin in paraview as well but all my visualization seems to appear in squarish appearance as shown in the image i provided in this forum post.

I heard some used pizza.py and lpp for the visualization but I am unsure on how to use them. I installed pizza.py by using the steps:

Hi All,

Please can you kindly help me with the following:
I have created my dump files, however I am struggling on converting them. I did the following:
cd $HOME/LIGGGHTS/liggghts_GIT/examples/LIGGGHTS/newContactModels
liggghts < in.newModels

cd post
ls

pizza
d=dump(“dump.newModels”). At this step I keep getting an error: Invalid syntax

Is there something I am doing wrong?

Thanks for your help

Good Day,

I want to ask. If for instance I have defined my granular walls as:

fix d_plate all mesh/surface file meshes/plate.stl type 1
fix h_pulley all mesh/surface file meshes/pulley.stl type 1
fix s_valve all mesh/surface file meshes/valve.stl type 1

If at the end, I want to dump only d_plate and h_pulley for Post Processing, what would be the appropriate modified command to;

dump dumpstl all mesh/stl 200 post/dump*.stl

Thank you in advance.

Good Day, resolved.

Thank you.

Hi all!

I am looking for a way to postprocess the volume or mass of all particles of a certain diameter in a geometrical region (e.g. a box). The aim would be to get a distribution of the particle diameter at the outlet of a bin (e.g. due to segregation) measured with a number of such geometrical regions.
The best I could find so far is the massflow/mesh command. Since the information I get with this command needs some further postprocessing by hand, I thought maybe somebody can give me a hint for a better possibility.

Thanks in advance!

Hi,

Hi, all

I am now trying to draw force chain in LIGGGHTS. Could anyone help and give me detailed steps to do this?

Thanks in advance,

Su

I am interested in using matlab matrices for post processing the data. Right now, I am converting the LIGGGHTS documents to VTK, using paraview I am exporting to CSV and using a numpy script I am converting to matlab matrices. I was wondering there was a way to directly convert the Liggghts file into CSV/Matlab Matrices.

Thanks
SIddharth