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,Commands_all.html)
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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"_PDF/SMD_LAMMPS_userguide.pdf to using Smooth
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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 the "Howto output"_Howto_output.html doc
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page 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
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correspond to the xx, yy, zz, xy, xz, yz components of the symmetric
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Cauchy stress tensor. The seventh entry is the second invariant of the
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stress tensor, i.e., 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 "Build
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package"_Build_package.html doc page for more info. This compute can
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only be used for particles which interact with the updated Lagrangian
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SPH pair style.
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[Related commands:]
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"compute smd/ulsph/strain"_compute_smd_ulsph_strain.html, "compute
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smd/ulsph/strain/rate"_compute_smd_ulsph_strain_rate.html "compute
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smd/tlsph/stress"_compute_smd_tlsph_stress.html
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[Default:] none
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