forked from lijiext/lammps
58 lines
1.7 KiB
Plaintext
58 lines
1.7 KiB
Plaintext
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
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:link(lws,http://lammps.sandia.gov)
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:link(ld,Manual.html)
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:link(lc,Section_commands.html#comm)
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:line
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compute smd/tlsph/defgrad command :h3
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[Syntax:]
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compute ID group-ID smd/tlsph/defgrad :pre
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ID, group-ID are documented in "compute"_compute.html command
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smd/tlsph/defgrad = style name of this compute command :ul
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[Examples:]
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compute 1 all smd/tlsph/defgrad :pre
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[Description:]
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Define a computation that calculates the deformation gradient. It is
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only meaningful for particles which interact according to the
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Total-Lagrangian SPH pair style.
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See "this PDF guide"_USER/smd/SMD_LAMMPS_userguide.pdf to use Smooth
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Mach Dynamics in LAMMPS.
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[Output info:]
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This compute outputss a per-particle vector of vectors (tensors),
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which can be accessed by any command that uses per-particle values
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from a compute as input. See "How-to discussions, section
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6.15"_Section_howto.html#howto_15 for an overview of LAMMPS output
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options.
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The per-particle vector values will be given dimensionless. See
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"units"_units.html. The per-particle vector has 10 entries. The first
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nine entries correspond to the xx, xy, xz, yx, yy, yz, zx, zy, zz
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components of the asymmetric deformation gradient tensor. The tenth
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entry is the determinant of the deformation gradient.
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[Restrictions:]
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This compute is part of the USER-SMD package. It is only enabled if
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LAMMPS was built with that package. See the "Making
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LAMMPS"_Section_start.html#start_3 section for more info. TThis
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compute can only be used for particles which interact via the total
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Lagrangian SPH pair style.
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[Related commands:]
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"smd/hourglass/error"_compute_smd_hourglass_error.html
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[Default:] none
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