yade-users team mailing list archive

[chiara modenese <c.modenese@xxxxxxxxx>]

On 21 June 2010 09:28, Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx> wrote:

> This 4k is only for the simple 1D case illustrated by figures. And if you
> look at the corresponding figure, it is in fact one mass with two springs
> (like one sphere with two contacts). So, the term coming from one contact is
> really 2k, wich gives the sqrt(2).
>
Oh I see. Thanks!

>
> Bruno
>
>
>> In fact there is no sqrt(2) factor in PFC manual if we consider the MDOF
>> system. They take an equivalent system where the stiffness is equal to 4k
>> being k the stiffness of each spring. At the end there is no sqrt(2) factor
>> in the computation of the time step.
>>
>> Chiara
>> ------------------------------------------------------------------------
>>
>>
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>
>
> --
> _______________
> Bruno Chareyre
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> Grenoble INP
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