[CIG-SHORT] Smoothing Issues

[Nick Wogan]

Hi Charles,

I really am appreciating your feedback. For the past few days I have been
trying very hard to make an 'irregular' mesh with LaGriT, where there are
much finer elements where the density anomaly is. LaGriT is proving to be
somewhat difficult to use. I do not have access to Cubit or Trelis, because
(as far as i know) those programs are only freely distributed to government
organizations such as USGS, and I work for the University of Oregon.

I just wanted to say I really appreciate your help! I will report back once
I have managed to make a mesh using LaGriT.

Cheers,
Nick

On Tue, Oct 25, 2016 at 2:10 PM, Nick Wogan <nicholaswogan at gmail.com> wrote:

> Thank you very much for the feedback,
>
> Attached is config/mesh/spacialdb file, and an image that provides a
> cross-section of the model giving material properties. I am using unusual
> material properties. Large parts of the model are youngs mod = 0.1 and
> Poisson's Ratio = 0.49
>
> The problem is as follows. There is an upper crust that has typical
> elastic material properties, and a lower crust that has young's mod = 0.1
> and Poisson's Ratio = 0.49. In the center top of the upper crust there is a
> small chunk of low density. The displacement output looks great, only the
> stress output looks checkered in certain areas.
>
> I checked the quality of the mesh. Here is the Lagrit output:
>
> epsilon1, epsilonaspect: 4.6113656E-11  9.8059273E-32
> elements with aspect ratio < .01:                      0
> elements with aspect ratio b/w .01 and .02:      0
> ...
> elements with aspect ration b/w .2 and .5 :       0
> elements with aspect ratio b/w .5 and 1. :         314844
> min aspect ratio = 0.3795E+00     max aspect ratio = 0.7107E+00
>
> Thanks you again,
> Nick
>
>
> ​
>  Checkered.zip
> <https://drive.google.com/file/d/0BxnRdwFIDyn5U01aZEYzUURrSzg/view?usp=drive_web>
> ​
>
> On Wed, Oct 19, 2016 at 4:40 PM, Nick Wogan <nicholaswogan at gmail.com>
> wrote:
>
>> Hi Pylith,
>>
>> I am having issues with the Pylith output lacking smoothness. It is very
>> clear in the attached photo plotting stress_zz that there are large jumps
>> in stress that are unexpected. Is this "checker-boarding" something that
>> can be fixed?
>>
>> Let me know if I should send the mesh, cfg, spacialdb files.
>>
>> Thanks!
>>
>> Nick Wogan
>> Research Assistant
>> University of Oregon
>>
>
>
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