<p dir="ltr">Yeah, this kind of thing sounds more like a solver feature than a feature in the actual mesh.</p>
<div class="gmail_quote">On Jul 16, 2014 11:08 AM, "Lukasz Kaczmarczyk" <<a href="mailto:Lukasz.Kaczmarczyk@glasgow.ac.uk">Lukasz.Kaczmarczyk@glasgow.ac.uk</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello,<br>
<br>
This is not directly in moab, but moab is essential part of FE package which I develop. I have cohesive elements there.<br>
Cohesive elements are implemented for arbitrary polynomial order. Interface elements are implemented using squashed prisms.<br>
<br>
In<br>
<a href="https://bitbucket.org/likask/mofem-joseph/wiki/Home#markdown-header-documentation" target="_blank">https://bitbucket.org/likask/mofem-joseph/wiki/Home#markdown-header-documentation</a><br>
<br>
Interface is implemented here,<br>
<a href="https://bitbucket.org/likask/mofem-joseph/src/5384a03f8517388a22609e24d055a69decb2e08a/mofem_v0.1/student_body/NonLinearFEMethodInterface.hpp?at=release" target="_blank">https://bitbucket.org/likask/mofem-joseph/src/5384a03f8517388a22609e24d055a69decb2e08a/mofem_v0.1/student_body/NonLinearFEMethodInterface.hpp?at=release</a><br>

<br>
Example with acr-length control is here,<br>
<a href="https://bitbucket.org/likask/mofem-joseph/src/5384a03f8517388a22609e24d055a69decb2e08a/mofem_v0.1/examples/arc_length_nonlinear_interface/arc_length_interface.cpp?at=release" target="_blank">https://bitbucket.org/likask/mofem-joseph/src/5384a03f8517388a22609e24d055a69decb2e08a/mofem_v0.1/examples/arc_length_nonlinear_interface/arc_length_interface.cpp?at=release</a><br>

<br>
Regards,<br>
Lukasz Kaczmarczyk<br>
<br>
"Prediction is very difficult, especially about the future." -- Niels Bohr<br>
"... there are dark corners in the Bourne shell, and people use all of them." --Chet Ramey<br>
<br>
HomePage:<br>
<a href="http://www.gla.ac.uk/schools/engineering/staff/lukaszkaczmarczyk/" target="_blank">http://www.gla.ac.uk/schools/engineering/staff/lukaszkaczmarczyk/</a><br>
<br>
MoFEM JosePH (Finite Element System)<br>
* <a href="https://en.wikipedia.org/wiki/MoFEM_JosePH" target="_blank">https://en.wikipedia.org/wiki/MoFEM_JosePH</a><br>
* <a href="https://bitbucket.org/likask/mofem-joseph/wiki/Home" target="_blank">https://bitbucket.org/likask/mofem-joseph/wiki/Home</a><br>
<br>
<br>
<br>
On 16 Jul 2014, at 16:42, Gerd Heber <<a href="mailto:gheber@hdfgroup.org">gheber@hdfgroup.org</a>><br>
 wrote:<br>
<br>
> Has anyone tried to represent cohesive elements* in MOAB?<br>
> Should we fall back to (degenerate) polyhedra or just<br>
> use the built-in triangles and quadrilaterals (and "double up")?<br>
><br>
> Thanks for your comments.<br>
> G.<br>
><br>
> * Topologically they are pairs of triangles or quadrilaterals<br>
> with linear or quadratic shape functions. Their constitutive<br>
> law is such that they seize to carry load beyond a certain<br>
> limit, at which point they separate. They should be treated like<br>
> 3D elements, although they have no volume/thickness.<br>
<br>
</blockquote></div>