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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@1968 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp 2008-07-25 14:42:02 +00:00
parent cc44a57275
commit 5aebb237fc
4 changed files with 33 additions and 20 deletions
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25
doc/pair_peri_pmb.html
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@ -24,11 +24,12 @@ pair_coeff * * 1.6863e22 0.0015001 0.0005 0.25
</P>
<P>Style <I>peri/pmb</I> style implements the Peridynamic bond-based prototype
microelastic brittle (PMB) model, which can be used to model materials
at the mesoscopic or macroscopic scale. The implementation of
at the mesoscopic or macroscopic scale. The canonical paper on
Peridynamics is <A HREF = "#Silling">(Silling)</A>. The implementation of
Peridynamics in LAMMPS is described in <A HREF = "#Parks">(Parks)</A>. Also see the
<A HREF = "http://www.sandia.gov/~mlparks/papers/PDLAMMPS.pdf">PDLAMMPS user
guide</A> for more
details about this particular potential.
details about this particular potential and using it in LAMMPS.
</P>
<P>The following coefficients must be defined for each pair of atom
types via the <A HREF = "pair_coeff.html">pair_coeff</A> command as in the examples
@ -36,15 +37,17 @@ above, or in the data file or restart files read by the
<A HREF = "read_data.html">read_data</A> or <A HREF = "read_restart.html">read_restart</A>
commands, or by mixing as described below:
</P>
<UL><LI>K (energy/distance^2 units)
<UL><LI>c (energy/distance/volume^2 units)
<LI>horizon (distance units)
<LI>s00 (?? units)
<LI>alpha (?? units)
<LI>s00 (unitless)
<LI>alpha (unitless)
</UL>
<P>K is the spring constant for Peridynamic bonds, the horizon is a
cutoff distance for truncating interactions, and s00 and alpha are
used as a bond breaking criteria. See the users guide for more
details.
<P>C is the effectively a spring constant for Peridynamic bonds, the
horizon is a cutoff distance for truncating interactions, and s00 and
alpha are used as a bond breaking criteria. The units of c are such
that c/distance = stiffness/volume^2, where stiffness is
energy/distance^2 and volume is distance^3. See the users guide for
more details.
</P>
<HR>
@ -88,4 +91,8 @@ LAMMPS</A> section for more info.
<P><B>(Parks)</B> Parks, Lehoucq, Plimpton, Silling, to appear in Comp Phys
Comm, (2008).
</P>
<A NAME = "Silling"></A>
<P><B>(Silling)</B> Silling, J Mech Phys Solids, 48, 175-209 (2000).
</P>
</HTML>

24
doc/pair_peri_pmb.txt
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@ -21,11 +21,12 @@ pair_coeff * * 1.6863e22 0.0015001 0.0005 0.25 :pre
Style {peri/pmb} style implements the Peridynamic bond-based prototype
microelastic brittle (PMB) model, which can be used to model materials
at the mesoscopic or macroscopic scale. The implementation of
at the mesoscopic or macroscopic scale. The canonical paper on
Peridynamics is "(Silling)"_#Silling. The implementation of
Peridynamics in LAMMPS is described in "(Parks)"_#Parks. Also see the
"PDLAMMPS user
guide"_http://www.sandia.gov/~mlparks/papers/PDLAMMPS.pdf for more
details about this particular potential.
details about this particular potential and using it in LAMMPS.
The following coefficients must be defined for each pair of atom
types via the "pair_coeff"_pair_coeff.html command as in the examples
@ -33,15 +34,17 @@ above, or in the data file or restart files read by the
"read_data"_read_data.html or "read_restart"_read_restart.html
commands, or by mixing as described below:
K (energy/distance^2 units)
c (energy/distance/volume^2 units)
horizon (distance units)
s00 (?? units)
alpha (?? units) :ul
s00 (unitless)
alpha (unitless) :ul
K is the spring constant for Peridynamic bonds, the horizon is a
cutoff distance for truncating interactions, and s00 and alpha are
used as a bond breaking criteria. See the users guide for more
details.
C is the effectively a spring constant for Peridynamic bonds, the
horizon is a cutoff distance for truncating interactions, and s00 and
alpha are used as a bond breaking criteria. The units of c are such
that c/distance = stiffness/volume^2, where stiffness is
energy/distance^2 and volume is distance^3. See the users guide for
more details.
:line
@ -83,3 +86,6 @@ LAMMPS"_Section_start.html#2_3 section for more info.
:link(Parks)
[(Parks)] Parks, Lehoucq, Plimpton, Silling, to appear in Comp Phys
Comm, (2008).
:link(Silling)
[(Silling)] Silling, J Mech Phys Solids, 48, 175-209 (2000).

2
doc/read_data.html
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@ -270,7 +270,7 @@ of analysis.
<TR><TD >full</TD><TD > atom-ID molecule-ID atom-type q x y z</TD></TR>
<TR><TD >granular</TD><TD > atom-ID atom-type diameter density x y z</TD></TR>
<TR><TD >molecular</TD><TD > atom-ID molecule-ID atom-type x y z</TD></TR>
<TR><TD >peri</TD><TD > atom-ID atom-type x y z volume density</TD></TR>
<TR><TD >peri</TD><TD > atom-ID atom-type volume density x y z</TD></TR>
<TR><TD >hybrid</TD><TD > atom-ID atom-type x y z sub-style1 sub-style2 ...
</TD></TR></TABLE></DIV>

2
doc/read_data.txt
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@ -248,7 +248,7 @@ ellipsoid: atom-ID atom-type x y z quatw quati quatj quatk
full: atom-ID molecule-ID atom-type q x y z
granular: atom-ID atom-type diameter density x y z
molecular: atom-ID molecule-ID atom-type x y z
peri: atom-ID atom-type x y z volume density
peri: atom-ID atom-type volume density x y z
hybrid: atom-ID atom-type x y z sub-style1 sub-style2 ... :tb(s=:)
The keywords have these meanings: