[MOAB-dev] Cohesive elements

[Timothy Tautges]

Yeah, this kind of thing sounds more like a solver feature than a feature
in the actual mesh.
On Jul 16, 2014 11:08 AM, "Lukasz Kaczmarczyk" <
Lukasz.Kaczmarczyk at glasgow.ac.uk> wrote:

> Hello,
>
> This is not directly in moab, but moab is essential part of FE package
> which I develop. I have cohesive elements there.
> Cohesive elements are implemented for arbitrary polynomial order.
> Interface elements are implemented using squashed prisms.
>
> In
>
> https://bitbucket.org/likask/mofem-joseph/wiki/Home#markdown-header-documentation
>
> Interface is implemented here,
>
> https://bitbucket.org/likask/mofem-joseph/src/5384a03f8517388a22609e24d055a69decb2e08a/mofem_v0.1/student_body/NonLinearFEMethodInterface.hpp?at=release
>
> Example with acr-length control is here,
>
> https://bitbucket.org/likask/mofem-joseph/src/5384a03f8517388a22609e24d055a69decb2e08a/mofem_v0.1/examples/arc_length_nonlinear_interface/arc_length_interface.cpp?at=release
>
> Regards,
> Lukasz Kaczmarczyk
>
> "Prediction is very difficult, especially about the future." -- Niels Bohr
> "... there are dark corners in the Bourne shell, and people use all of
> them." --Chet Ramey
>
> HomePage:
> http://www.gla.ac.uk/schools/engineering/staff/lukaszkaczmarczyk/
>
> MoFEM JosePH (Finite Element System)
> * https://en.wikipedia.org/wiki/MoFEM_JosePH
> * https://bitbucket.org/likask/mofem-joseph/wiki/Home
>
>
>
> On 16 Jul 2014, at 16:42, Gerd Heber <gheber at hdfgroup.org>
>  wrote:
>
> > Has anyone tried to represent cohesive elements* in MOAB?
> > Should we fall back to (degenerate) polyhedra or just
> > use the built-in triangles and quadrilaterals (and "double up")?
> >
> > Thanks for your comments.
> > G.
> >
> > * Topologically they are pairs of triangles or quadrilaterals
> > with linear or quadratic shape functions. Their constitutive
> > law is such that they seize to carry load beyond a certain
> > limit, at which point they separate. They should be treated like
> > 3D elements, although they have no volume/thickness.
>
>
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