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[kan <nicessgg@xxxxxxxxx>]

Hi,dear all,

 I am sorry for sending this kind of question again, but I really have
problem , for my program, the calculated dt is at the lever of 10^(-8), it
is too small, what is a reasonable dt for practical computation.
my parameters are:
density of particle: 2600 kg/m^3
radius of particle : 0.001 m
kn=120 Gpa
kn/ks=2.5
the bond :
kn_bond=120 GPa,
kn/ks_bond =1;

is the 10^-8 reasonable?
how chould I increase the dt?

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