[CIG-SHORT] Griffith Crack Theory Implementation

[Jared William Graham Atkinson]

Great, thank you guys for the quick reply.

I am definitely in the business of getting my hands dirty, and I
understand that you are all focused on other matters.  I appreciate you
taking the time to reply and I will jump in to the code as soon as I¹m
able.

Cheers,
Jared

On 1/28/14, 8:27 PM, "Charles Williams" <C.Williams at gns.cri.nz> wrote:

>Just to add to Brad¹s comments ‹ if you¹re talking about crack
>propagation, that is not currently a feature of PyLith.  The fault
>surface would need to be pre-defined.
>
>Cheers,
>Charles
>
>
>On 29/01/2014, at 11:22 am, Brad Aagaard <baagaard at usgs.gov> wrote:
>
>> Jared,
>> 
>> PyLith's currently has two fault implementations. One is for
>>prescribing slip time histories on the fault, and the other uses a
>>friction model as a constitutive model for sliding/opening on the fault
>>surface. In setting up the fault constitutive model implementation, I
>>explicitly formulated it in terms of a friction model,
>> 
>> T_s = C + mu_f * T_n,
>> 
>> where T_s is the shear traction, C is cohesion, mu_f is the coefficient
>>of friction, and T_n is the normal traction. Adding difference friction
>>models is designed to be very easy and there is a template for doing so.
>>The fault constitutive implementation could be rewritten to be more
>>general and modular and would involve only a small piece of the code if
>>you are inclined to get your hands dirty. We have much high priority and
>>bigger issues on our plate right now related to expanding the
>>capabilities of the code for higher order discretizations and
>>multiphysics.
>> 
>> Regards,
>> Brad
>> 
>> 
>> On 01/28/2014 12:06 PM, Jared William Graham Atkinson wrote:
>>> Hello all,
>>> 
>>> I am currently working with Dr. Brad Hager at MIT and am looking at
>>>attempting to implement Griffith crack theory as a faulting/fracturing
>>>mechanism in Pylith.
>>> 
>>> I have spoken with Lucas Willemsen about his previous work on
>>>Rate-State Ageing, and he suggested I contact this mailing list to see
>>>if the current Pylith iteration would be capable of handling a new
>>>constitutive law.
>>> 
>>> Any insight into this issue and its viability is greatly appreciated!
>>> 
>>> Thank you for your time.
>>> Jared Atkinson
>>> 
>>> 
>>> 
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>> 
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>
>Charles A. Williams
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