forked from lijiext/lammps
54 lines
1.7 KiB
Plaintext
54 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.
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It is only meaningful for particles which interact according to the Total-Lagrangian SPH pair style.
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See "this PDF guide"_USER/smd/SMD_LAMMPS_userguide.pdf to use Smooth Mach Dynamics in
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LAMMPS.
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[Output info:]
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This compute outputss a per-particle vector of vectors (tensors), which can be
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accessed by any command that uses per-particle values from a compute as input. See
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"How-to discussions, section 6.15"_Section_howto.html#howto_15
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for an overview of LAMMPS output options.
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The per-particle vector values will be given dimensionless. See "units"_units.html.
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The per-particle vector has 10 entries. The first nine entries correspond to the xx, xy, xz, yx, yy, yz, zx, zy, zz components
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of the asymmetric deformation gradient tensor. The tenth 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 LAMMPS was
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built with that package. See the "Making LAMMPS"_Section_start.html#start_3
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section for more info. TThis compute can only be used for particles which interact via the
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total 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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