[CIG-SHORT] Fwd: rheology model in pylith

[Eric Hetland]

As it is, I am covering this in a class right now. Attached is a document I
use deriving the equivalence of the parameters in either a general Maxwell
or Kelvin. There are some checks on the derivations, so I think it is
correct, but please let me know if it doesn't seem like its working...



On Fri, Jan 30, 2015 at 10:59 AM, Brad Aagaard <baagaard at usgs.gov> wrote:

> Zhen,
>
> Charles Williams is more familiar with how to setup the generalized
> Maxwell model to match some common viscoelastic rheologies than I am. I am
> reposting this question to cig-short and cc'ing Charles.
>
> Brad
>
>
>
> -------- Forwarded Message --------
> Subject:        rheology model in pylith
> Date:   Fri, 30 Jan 2015 02:15:43 +0000
> From:   Liu, Zhen (329A) <Zhen.Liu at jpl.nasa.gov>
> To:     baagaard at usgs.gov <baagaard at usgs.gov>
>
>
>
> Hi Brad,
>
> How are you? We have email communication before about CIG workshop. At
> present I am looking into the Pylith to see if I can use it in my
> research. I notice that current pylith has Bulk rheology models
> including Elastic model, Linear Maxwell viscoelastic models, Generalized
> Maxwell viscoelastic models, Power-law viscoelastic model,
> Drucker-Prager elastoplastic model. I am interested in adopting
> bi-viscous Burgers rheology, which is the Kelvin-voigt plus maxwell
> rheology in series. Do you know if this is something already in Pylith
> or need to be implemented?
>
> I understand that Kelvin-voigt and Maxwell rheology can be represented
> as special case from generalized maxwell viscoelastic models. But it is
> less clear to me how to represent the Burgers theology from the
> generalized maxwell model (or not). Your any insight would be much
> appreciated!
>
> Thanks in advance for the help,
>
> Best regards,
> Zhen
> -----------------------------------------------
>
> Dr. Zhen Liu
>
> Jet Propulsion Laboratory, M/S 300-233
>
> California Institute of Technology
>
> 4800 Oak Grove Drive
>
> Pasadena, CA 91109
>
> Ph: 818-393-7506
>
> fax: 818-354-9476
>
> email: zhen.liu at jpl.nasa.gov
>
>
>
>
>
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-- 

---------------------------------------------------------------

Eric Hetland

Assistant Professor

Department of Earth & Environmental Sciences

3008 CC Little Bldg

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Ann Arbor, MI 48103, USA

ehetland at umich.edu

www.earth.lsa.umich.edu/~ehetland
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