forked from lijiext/lammps
57 lines
1.3 KiB
Plaintext
57 lines
1.3 KiB
Plaintext
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"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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bond_style nonlinear command :h3
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[Syntax:]
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bond_style nonlinear :pre
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[Examples:]
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bond_style nonlinear
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bond_coeff 2 100.0 1.1 1.4 :pre
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[Description:]
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The {nonlinear} bond style uses the potential
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:c,image(Eqs/bond_nonlinear.jpg)
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to define an anharmonic spring "(Rector)"_#Rector of equilibrium
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length r0 and maximum extension lamda.
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The following coefficients must be defined for each bond type via the
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"bond_coeff"_bond_coeff.html command as in the example above, or in
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the data file or restart files read by the "read_data"_read_data.html
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or "read_restart"_read_restart.html commands:
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epsilon (energy)
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r0 (distance)
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lamda (distance) :ul
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[Restrictions:]
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Bond styles can only be set for atom styles that allow bonds to be
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defined.
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This bond style is part of the "molecular" package. It is only
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enabled if LAMMPS was built with that package. See the "Making
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LAMMPS"_Section_start.html#2_2 section for more info.
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[Related commands:]
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"bond_coeff"_bond_coeff.html, "delete_bonds"_delete_bonds.html
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[Default:] none
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:line
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:link(Rector)
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[(Rector)] Rector, Van Swol, Henderson, Molecular Physics, 82, 1009 (1994).
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