LIGGGHTS® - User Forum

Hi everyone! I'm very new to LIGGGHTS, and i'm trying to start example from the Tutorial (Example 2 - Continous Blending Mixer). When i want to start simulation i got this strange "Abort trap: 6" error. Is this happening because of errors in my input file? I'm using Mac, OSX 10.9.4 and latest version of Publicly releasers LIGGGHTS. I also attached my input file.
Thanks for any help!

Is there any way to produce a large number of rigid bodies with the grains in each rigid body arranged in a tetrahedral positions?
I have managed to produce small number of such rigid bodies by manually creating data-file and then "fix rigid group" atoms in each tetrahedron.
Now I can not think of a way to produce say 4000 rigid bodies like this.

Thanks

Hi all,

I recently installed ligghts/lammps with parallel support. When I try to execute one of the example scripts or load the module in a python console, the following is output:

>>> from lammps import lammps
>>> lmp = lammps()
Traceback (most recent call last):
File "", line 1, in
File "lammps.py", line 37, in __init__
raise OSError,"Could not load LAMMPS dynamic library"
OSError: Could not load LAMMPS dynamic library

What is the problem?

Thanks,
-Nabil

Hello everyone,

I am playing with multi-sphere method to generate aggregates of sphere particles by using hybrid granular molecular. First I use 'read_data' to import the essential particles (granular). Then I use 'fix rigid' to to generate clumps (molecule). I am not sure how liggghts calculate the mass of clumps and its gravity center? When importing essential particles, the 'Masses' are for sphere particles, right?

Hello Everyone,

is there somebody who has experience with the combination of a servo-mesh and rotation around an axis?

Hello Everybody,

Could some one please give some ideas about how to obtain force -displacement curve between two particles in contact .

Many Thanks,

Luton

Hi

I was unable to find in the literature the constant "K finnie" for steel, someone can tell me?

regards

Hi

I was unable to find in the literature the constant "K finnie" for steel, someone can tell me?

regards

Hi,

I tried to perform a simulation with bonds in LIGGGHTS 3.0.2 version and it is not possible to initialize the simulation. As the guide suggest, I wrote the command atom_type bond. A similar problem occurs with the pair_styles.

However, is it only working in old LIGGGHTS versions? How should I addapt these commands? Additionaly is there any online resource in which are described the commands for this current version?

Thank you very much!

How can define a vector variable in Liggghts?

regards