[CIG-SHORT] slip orientation for a nonplanar fault surface

[Jiangzhi Chen]

Oh I understand what you mean, since the strain is not finite, the 
deformation should not change the slip direction great enough, so the 
prescribed slip should work.

On 10/20/2014 03:50 PM, Brad Aagaard wrote:
> Jiangzhi,
>
> I don't understand why you think prescribed slip won't work for a 
> kinematic fault interface?
>
> Regards,
> Brad
>
>
> On 10/20/2014 03:44 PM, Jiangzhi Chen wrote:
>> The time scale is several hundreds of years, about one earthquake cycle.
>>
>> On 10/20/2014 03:34 PM, Brad Aagaard wrote:
>>> Jiangzhi,
>>>
>>> What time scale are you modeling? PyLith should be appropriate if the
>>> problem can be solved with infinitesimal or small strains.
>>> Additionally, the fault formulation in PyLith breaks down when the
>>> offset become large enough so that the slip vector would need to be
>>> changing. We expect that a finite-strain formulation would be needed
>>> as well for those types of problems.
>>>
>>> Regards,
>>> Brad
>>>
>>> On 10/20/2014 03:24 PM, Jiangzhi Chen wrote:
>>>> Thanks for the quick response. The region is part of the Cascadia
>>>> subduction zone, where the Juan de Fuca plate moves northeastward and
>>>> subducts. The aim is to understand how the subduction influences the
>>>> surface displacement field, and explains the geodetic observation. The
>>>> upper slab interface is supposed to be a dynamic fault surface, and 
>>>> the
>>>> lower interface is a kinematic surface. For now, I am using two
>>>> kinematic surface just to make the slab go under.
>>>>
>>>> Jiangzhi
>>>>
>>>> On 10/20/2014 03:08 PM, Brad Aagaard wrote:
>>>>> Jiangzhi,
>>>>>
>>>>> I don't understand what you are trying to do. What research question
>>>>> are you trying to answer? What do you want to learn from the
>>>>> simulation?
>>>>> What are your observations/constraints?
>>>>>
>>>>> Regards,
>>>>> Brad
>>>>>
>>>>>
>>>>>
>>>>> On 10/20/2014 03:02 PM, Jiangzhi Chen wrote:
>>>>>> Hi everyone,
>>>>>>
>>>>>>      I am working on a subduction simulation, where the fault
>>>>>> interface
>>>>>> is nonplanar, and the subduction slab moves in northeast direction
>>>>>> at 4
>>>>>> cm/year before it meets the overriding plate. My question is how 
>>>>>> I can
>>>>>> specify the kinematic fault interface. It is not appropriate to use
>>>>>> predefined slip functions, because the slip rates depend on the
>>>>>> location
>>>>>> which is changing with time. Is there a way to make this work? Any
>>>>>> help
>>>>>> is appreciated.
>>>>>>
>>>>>> cheers,
>>>>>> Jiangzhi
>>>>>>
>>>>>>
>>>>>>
>>>>>>
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