[CIG-SHORT] plastic deformation

[Charles Williams]

Yes, I should have made that clear.  Copy the existing files to use as templates.

Cheers,
Charles


> On 2/12/2014, at 9:55 am, Brad Aagaard <baagaard at usgs.gov> wrote:
> 
> On 12/01/2014 12:40 PM, Charles Williams wrote:
>> Hi Birendra,
>> 
>> I’m glad to hear you’re implementing the Cam Clay model.
>> Unfortunately, I have no idea on the best reference to use.  I have a
>> number of plasticity papers on my computer.  After a quick glance, I
>> see a paper by Hashiguchi and Mase (Int. J. Plasticity, 2007) that
>> appears to describe an extension of the Cam Clay model.  That might
>> be worth a look.
>> 
>> In answer to your questions:
>> 
>> 1.  Yes, the best place to start is by altering the existing
>> DruckerPrager3D files.  The elasticConsts are the consistent tangent.
>> Also, is the formulation an additive decomposition into elastic and
>> plastic strain?
> 
> Clarification: I think Charles meant to suggest copying the existing files to a new name (e.g., CamClay3D) rather than editing existing files.
> 
> I strongly recommend forking the PyLith repository to do this so you can stay up-to-date and potentially contribute back to the main PyLith development tree.
> 
> Regards,
> Brad
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Charles A. Williams
Scientist
GNS Science
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C.Williams at gns.cri.nz