Inserting cohesive zone and generating mesh from a input polyhedral_mesh.obj file

[Rumi381]

Hi, everyone. I am new to exploring Neper and facing a particular problem with one of my research. If I have a .obj file containing a polyhedral mesh of a volume, as shown in the figure below, can I leverage Neper, to?

1. load the mesh file,
2. insert cohesive zones at the internal faces of the polyhedral cells
3. mesh the whole model with wedge or tetrahedral elements
4. and Finally, export the resulting mesh as a .inp file to use in Abaqus

I am really struggling with these requirements. Please guide me if anyone knows how to achieve this goal. Here is an example of a polyhedral mesh I will be using:
3holes_poly.zip

[rquey]

It's an interesting case and yes, it should work, but you'll have to write your "polyhedra mesh" as a Tessellation File (.tess).

May I ask what your model represents? What is your application?

[rquey]

It will have support for both obj and ovm, but there are still bugs...

For the rest, see my previous post: #905 (reply in thread)

[Rumi381]

Thank you @rque. Would you please briefly comment on the second question regarding cohesive zone insertion?

[rquey]

I've updated #905 (reply in thread) with the correct command.

[rquey]

Now available in version 4.10.0.

Typical commands are

neper -T -loadtess "file(Block3D_poly.ovm)" -reg 1 -o Block3D_poly
neper -M Block3D_poly.tess -interface cohesive -format inp

[Rumi381]

Great! I am installing version 4.10.0 but getting the following failed test cases, though I have installed the dependencies. Would you please suggest any quick fix?:

The following tests FAILED:
147 - M/cl (Failed)
148 - M/cl_expr (Failed)
151 - M/clmin (Failed)
152 - M/clratio (Failed)
153 - M/cut (Failed)
155 - M/dim2 (Failed)
156 - M/dim_expr (Failed)
158 - M/faset (Failed)
161 - M/interface (Failed)
162 - M/interface2 (Failed)
164 - M/mesh2dalgo_dela (Failed)
165 - M/mesh2dalgo_fron (Failed)
166 - M/mesh2dalgo_mead (Failed)
167 - M/mesh2dalgo_netg (Failed)
168 - M/mesh3dalgo_netggmne (Failed)
169 - M/mesh3dalgo_netggmsh (Failed)
170 - M/mesh3dalgo_netgnetg (Failed)
171 - M/meshing (Failed)
173 - M/meshqualdisexpr (Failed)
174 - M/meshqualexpr (Failed)
175 - M/meshqualmin (Failed)
176 - M/morpho_cube (Failed)
177 - M/msh4 (Failed)
178 - M/nset1 (Failed)
179 - M/nset2 (Failed)
180 - M/nset3 (Failed)
181 - M/order (Failed)
188 - M/pl (Failed)
189 - M/rcl (Failed)
190 - M/rcl_expr (Failed)
193 - M/remesh1 (Failed)
194 - M/remesh2 (Failed)
195 - M/remesh3 (Failed)
197 - M/rodrigues_per_cubic (Failed)
198 - M/rodrigues_per_hexagonal (Failed)
204 - M/statelsetco (Failed)
210 - M/stateltco (Failed)
232 - V/asymptote (Failed)

[rquey]

Gmsh not or improperly installed. Same for asymptote.

[Rumi381]

I will try installing them again. However, I will test some of my OVM files and get back to you if I have any observations or issues.

[Rumi381]

Hi @rquey. I have installed all the dependencies. However, I always get the following error with Module M. Is there any specific reason for this? Please suggest what I should do.

Info : MODULE -M loaded with arguments:
Info : [ini file] (none)
Info : [com line] n100-id1.tess -for inp
Info : ---------------------------------------------------------------
Info : Reading input data...
Info : - Reading arguments...
Info : Loading input data...
Info : - Loading tessellation...
Info : [i] Parsing file n100-id1.tess'... Info : [i] Parsed file n100-id1.tess'.
Info : Meshing...
Info : - Preparing... (cl = 0.1077) 100%
Info : - 0D meshing... 100%
Info : - 1D meshing... 100%
Info : - 2D meshing... 100% (0.37|0.83/88%| 9%| 3%)
Info : - Fixing 2D-mesh pinches...
Info : - 3D meshing... Error : - Failed to read msh file
Aborted (core dumped)