Rock crack simulation LAMMPS

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1

Hello all,

I am trying to simulate rock cutting in LAMMPS. I am trying to implement cutter as two perpendicular walls.

Can anyone tell me if this is possible or impossible with lamps!

And I am using below commands -

fix wall_x all wall/gran/hooke/history 1 0 xplane -1 1 1
fix wall_y all wall/gran/hooke/history 1 0 yplane -2 2 1

and without any wall on Z plane. I suppose at least this will give me two perpendicular lines but all I see is a single plane.

Thanks,
Pradeep

2

There is no fix wall/gran/hooke/history command in LAMMPS,
only a fix wall/gran. As its doc page explains it bounds the entire

simulation domain with one (or more) flat walls. I don’t see
how that will create a “cutter”.

Steve

3

Hello Steve,

Thank you for your mail. Actually I am trying simulate something like in this video.

Can you please let me know if this is possible by LIGGGHTS or not?

Thanks,
Pradeep

4

Hello Steve,

Thank you for your mail. Actually I am trying simulate something like in
this video.
Can you please let me know if this is possible by LIGGGHTS or not?

you are asking in the wrong forum. this is the mailing list for
LAMMPS, not LIGGGHTS.

second, if you want to reproduce something that you have seen
somewhere, you should start by asking the person that has done that.

as far as software packages go, you can look at the documentation and
whether something is doable or not is generally for you to figure out.
with any large and complex software package, there are often many more
things possible than what the developers can imagine. however, just
plain common sense explains that what you were trying with two walls
*cannot* work for simple geometric reasons. so you need to consider a
different strategy. i am fairly certain, that what you want to do is
doable, but i don't care enough about this that i want to spend the
time to do the figuring out part for you and i doubt that anybody else
here will.

axel.

5

Hello Axel,

Thank you for your reply. I totally agree on that. As I am a beginner here, I am just seeking some confirmation.

Anyways I see the link for video is missed in previous mail and as a reference for this mail here it is

http://www.youtube.com/watch?v=muZuukjb_6k

Thanks,

Pradeep

6

Hello Axel,

Thank you for your reply. I totally agree on that. As I am a beginner here,
I am just seeking some confirmation.

in research this kind of question is pretty much useless. what does it
help you, if somebody says "yes" or "no"? you *still* have to do the
work and figure it out. if you are a beginner, it is better to start
with a project where you *already* know that there is a solution.
picking something where you neither know if it can be done nor how the
software works that you want to use will lead you down a path where
you never know whether something is failing because you did it wrong
or whether it cannot work at all.

axel.