First things first, I just started using Coreform Cubit, so I am an absolute beginner. I hope my problem is trivial and easy to solve.
I want to mesh a somewhat complex stl geometry, a porous beam:
When trying to mesh it with tet elements I get the following error messages:
Matching intervals successful.
Begin tri meshing 197 surfaces 1, 3, 4, 6 to 13, 16 to 51, 53 to 60, 62 to 65,
67, 68, 72 to 80, 83 to 91, 93 to 102, 104 to 149, 152 to 159, 163 to 167,
172 to 187, 190 to 197, 199 to 211, 213 to 221, 223 to 225
WARNING: MeshGems has problem meshing surfaces 118 72 179 126 119 7 37 86 42 17 157 78 43 128 156 19 27 114 140 173 205 158 3 63 167 191 10 172 34 141 44 193 38 76 55 58 130 59 186 30 101 194 50 219 149 133 182 80 155 39 184 181 200 31 124 206 87 89 68 111 107 13 57 145 202 106 203 90 210 109 201 33 47 195 91 23 127 122 75 36 163 208 99 29 60 197 54 143 98 199 45 1 9 159 164 48 175 165 104 12 93 196 180 144 142 116 26 207 177 125 218 112 123 108 110 220 20 16 64 176 166 178 153 105 187 74 134 41 88 117 135 190 77 53 65 40 131 100 138 22 120 225 28 183 146 83 209 85 24 25 46 73 152 51 84 192 35 147 136 11 102 215 115 154 113 148 139 217 174 56 223 95 79 121 49 132 185 129 221 32 94 204 21 137 62 213 97 67 216 96 6 18 214 8 4 224
WARNING: Warning : 6 intersection(s) may be still present in the resulting mesh
WARNING: You may have overlapping surfaces you are trying to mesh. Meshgems does not mesh overlapping surfaces in the same meshing operation. Consider doing a 'find overlap' check and meshing these surfaces separately.
Completed trimeshing 197 surfaces
WARNING: Found duplicate tri with nodes 644250 482153 644297
ERROR: Unable to mesh boundary
ERROR: Volume 1 meshing unsuccessful using scheme: tetmesh
Meshing time: 50.153022
ERROR: 1 volume did not mesh : Volume 1
Although some entities failed to mesh, Cubit will log the command in the journal file anyway, for future use.
Finished Command: mesh volume 1
I tried searching for small features and removing them, I did a find overlap check (which did not return any overlaps) and I tried simplifying and remeshing the original stl geometry. All so far without any success.
I would be glad for any tips on how to mesh this geometry.