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/ulsph_stress command :h3
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[Syntax:]
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compute ID group-ID smd/ulsph_stress :pre
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ID, group-ID are documented in "compute"_compute.html command
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smd/ulsph_stress = style name of this compute command :ul
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[Examples:]
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compute 1 all smd/ulsph_stress :pre
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[Description:]
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Define a computation that outputs the Cauchy stress tensor.
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See "this PDF guide"_USER/smd/SMD_LAMMPS_userguide.pdf to using Smooth Mach Dynamics in LAMMPS.
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[Output info:]
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This compute calculates 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 "Section_howto 15"_Section_howto.html#howto_15
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for an overview of LAMMPS output options.
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The values will be given in "units"_units.html of pressure.
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The per-particle vector has 7 entries. The first six entries correspond to the xx, yy, zz, xy, xz, yz components
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of the symmetric Cauchy stress tensor. The seventh entry is the second invariant of the stress tensor, i.e.,
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the von Mises equivalent stress.
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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 LAMMPS"_Section_start.html#start_3
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section for more info. This compute can only be used for particles which interact with the updated Lagrangian SPH pair style.
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[Related commands:]
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"smd/ulsph_strain"_compute_smd_ulsph_strain.html, "smd/ulsph_strain_rate"_compute_smd_ulsph_strain_rate.html
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"smd/tlsph_stress"_compute_smd_tlsph_stress.html :pre
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[Default:] none
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