[CIG-SHORT] Mesh interpenetration

[Brad Aagaard]

Teng,

When you use the Warp filter in ParaView with a scale larger than 1.0, 
the deformation is exaggerated. As a result, *sometimes* it looks like 
there is interpenetration or opening, when in fact there is not. You 
should look at the opening component of the fault slip field (and the 
corresponding displacements) to see if there is really fault opening or 
interpenetration.

As Joe Andrews pointed out many years ago, most fault intersections are 
geometrically incompatible so one does expect some fault opening if 
there is slip on all faults at an intersection. If the solution is 
converging properly, then we would never expect interpenetration.

Regards,
Brad


On 10/31/2017 09:05 PM, Li, Teng wrote:
> Hi,
> 
> Please see the attached picture which shows the junction of the 
> secondary fault and the main fault. I used paraview to visualize the vtk 
> file. In the paraview, I used wrap by vector filter to show the 
> displacement of the junction. As we can see, it seems interpenetration 
> occurs in this area. And two faces separate from each other.  I wonder 
> whether this is a valid result? And if it is not right, what might be 
> the reason? Thanks.
> 
> Best,
> Teng
> 
> Teng Li
> 
> Master Candidate in Structures
> 
> Department of Civil and Environmental Engineering
> 
> University of Illinois at Urbana-Champaign
> 
> 205 North Mathews Ave, Urbana, IL. 61801
> 
> Phone:(217)8196210, Email: tengli2 at illinois.edu
> 
> 
>