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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@8187 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp 2012-05-25 15:04:57 +00:00
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7
doc/pair_gran.html
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@ -131,8 +131,11 @@ constant with units of force/distance. In the Hertzian case, Kn is
like a non-linear spring constant with units of force/area or like a non-linear spring constant with units of force/area or
pressure, and as shown in the <A HREF = "#Zhang">(Zhang)</A> paper, Kn = 4G / pressure, and as shown in the <A HREF = "#Zhang">(Zhang)</A> paper, Kn = 4G /
(3(1-nu)) where nu = the Poisson ratio, G = shear modulus = E / (3(1-nu)) where nu = the Poisson ratio, G = shear modulus = E /
(2(1+nu)), and E = Young's modulus. Similarly, Kt = 8G / (2-nu). (2(1+nu)), and E = Young's modulus. Similarly, Kt = 4G / (2-nu).
Thus in the Hertzian case Kn and Kt can be set to values that (NOTE: in an earlier version of the manual, we incorrectly stated that
Kt = 8G / (2-nu).)
</P>
<P>Thus in the Hertzian case Kn and Kt can be set to values that
corresponds to properties of the material being modeled. This is also corresponds to properties of the material being modeled. This is also
true in the Hookean case, except that a spring constant must be chosen true in the Hookean case, except that a spring constant must be chosen
that is appropriate for the absolute size of particles in the model. that is appropriate for the absolute size of particles in the model.

5
doc/pair_gran.txt
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@ -117,7 +117,10 @@ constant with units of force/distance. In the Hertzian case, Kn is
like a non-linear spring constant with units of force/area or like a non-linear spring constant with units of force/area or
pressure, and as shown in the "(Zhang)"_#Zhang paper, Kn = 4G / pressure, and as shown in the "(Zhang)"_#Zhang paper, Kn = 4G /
(3(1-nu)) where nu = the Poisson ratio, G = shear modulus = E / (3(1-nu)) where nu = the Poisson ratio, G = shear modulus = E /
(2(1+nu)), and E = Young's modulus. Similarly, Kt = 8G / (2-nu). (2(1+nu)), and E = Young's modulus. Similarly, Kt = 4G / (2-nu).
(NOTE: in an earlier version of the manual, we incorrectly stated that
Kt = 8G / (2-nu).)
Thus in the Hertzian case Kn and Kt can be set to values that Thus in the Hertzian case Kn and Kt can be set to values that
corresponds to properties of the material being modeled. This is also corresponds to properties of the material being modeled. This is also
true in the Hookean case, except that a spring constant must be chosen true in the Hookean case, except that a spring constant must be chosen