[CIG-SHORT] dynamic benchmark problem

[Brad Aagaard]

Roby,

There is a zone of forced nucleation. See the benchmark description:
http://scecdata.usc.edu/cvws/benchmark_descriptions.html

Note that I had to implement a new friction model for this benchmark. It 
is available in the v1.7-trunk and scecdynrup PyLith branches in the SVN 
repository.

Brad


On 04/15/2013 02:07 PM, Roby Douilly wrote:
> Brad,
>
> Correct me if I am wrong but it appears that in benchmark TPV24-25 there is no nucleation zone.
> In this one I can see that the traction increases with depth but I didn't see any nucleation zone.
> Is that right?
>
> Roby
>
>
> On Apr 15, 2013, at 3:11 PM, Brad Aagaard <baagaard at usgs.gov> wrote:
>
>> On 4/15/13 12:14 PM, surendra at caltech.edu wrote:
>>>
>>> On Apr 15, 2013, at 12:52 PM, Roby Douilly wrote:
>>>
>>>> Thank you Brad, I will try changing the shear wave speed and wave
>>>> period to see. But I do have a question regarding this benchmark. I
>>>> run the 200m resolution and in this case the rupture didn't
>>>> propagate in the branch fault. The reason I was trying to run the
>>>> 100m resolution is to see if the rupture could propagate on the
>>>> branch fault. Do you think that the rupture will propagate on the
>>>> branch fault at 100m  and also is 200m to large for the rupture to
>>>> jump on the branch fault?
>>>
>>> By going to finer resolutions, you are testing convergence of a
>>> problem rather than addressing the question of whether or not rupture
>>> propagates on to the branch.  Branch fault may or may not rupture
>>> depending on factors like rupture speed, branch angle and stress
>>> orientation but should be independent of resolution as long as
>>> cohesive zone is well resolved.
>>
>> Yes, the resolutions are testing convergence, but the convergence is not
>> simply limited to resolving the cohesive zone. The behavior depends on
>> the dynamic stress changes associated with the propagating seismic waves
>> that interact with the rupture. The resolution must also be fine enough
>> to resolve the peaks in the dynamic stress changes.
>>
>> Brad
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>
>
>
> Roby
>
> ---------------------------------------------------------------------------------
> Roby Douilly
> Graduate Student
> Department of Earth, Atmospheric, and Planetary Sciences
> Purdue University
> 550 Stadium Mall Dr.
> West Lafayette, IN 47907-2051
> rdouilly at purdue.edu
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