Hello dear Sir’s
I want to deform a nanorod using command
fix 6 all deform 1 x vel 0.1 remap v units box and
fix 6 all deform 1 x vel 0.1 remap v units box remap v
but for both the cases despite of necking from the centre only small element of both sides (ends) of rod deformed. major portion of the rod remains unaffected during the uniaxil tensile extension.
i wants proper deformation of the rod from the centre and to calculate stress-strain relationship. Kindly help me in this regard.
There are many ways to use fix deform improperly. E.g.
try to deform too fast. Remap v is also normally used for
liquids as the fix deform doc page says.
Hello dear Sir’s
I want to change the boundaries of rod after reading the restart file (boundary p p p) to (s p p) using command
read_restart restart.small
change_box all boundary s p p
but the program terminates with an error
Reading restart file …
orthogonal box = (-0.1 -0.1 -0.1) to (61 31 31)
1 by 1 by 1 processor grid
4769 atoms
ERROR: Illegal change_box command
Kindly help me in this regard.
Hello dear Sir's
I want to change the boundaries of rod after
reading the restart file (boundary p p p) to (s p p) using command
read_restart restart.small
change_box all boundary s p p
but the program terminates with an error
Reading restart file ...
orthogonal box = (-0.1 -0.1 -0.1) to (61 31 31)
1 by 1 by 1 processor grid
4769 atoms
ERROR: Illegal change_box command
Kindly help me in this regard.
kindly make sure that you look at the change box documentation
again and also make sure that the version of the documentation
matches the version of your lammps executable. the online version
always matches the current lammps version.