[CIG-SHORT] viscous_strain for MaxwellIsotropic3D

[Charles Williams]

Dear Ikuo,

I have not had a chance to look at this yet, but I will try to look at it in the next few days.

Cheers,
Charles


On 19/03/2010, at 7:29 PM, Ikuo Cho wrote:

> Dear PyLith Developers
> 
> The values of viscous_strain decrease with an increase of time when the
> viscoelastic property is given as MaxwellIsotropic3D. I confirmed
> quantitatively that the "viscous_strain" represents the elastic strains
> for some problem (a relation, 2*(rigidity)*(diviatoric
> "viscous_strain")= stress, was established). 
> 
> The values of viscous_strain decrease with an increase of time when the
> viscoelastic property is given as PowerLaw3D. A relation,
> 2*(rigidity)*(diviatoric total_strain-diviatoric viscous_strain)= stress,
> was confirmed in this case.
> 
> ----------------------------------------------------------
> Ikuo Cho  ( ikuo-chou at aist.go.jp )
> Geological Survey of Japan,
> National Institute of Advanced Industrial Science and Technology
> Tsukuba Central 7, Tsukuba 305-8567 Japan
> Tel +81-29-861-3891, Fax +81-29-861-3682
> ----------------------------------------------------------
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Charles A. Williams
Scientist
GNS Science
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Lower Hutt  5040
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C.Williams at gns.cri.nz
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