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Found 5 results

  1. Is it important to have smooth connected lines between different meshed components? What are consequences of not having the connectivity?
  2. Hello at all, during a topology optimization of a wireframe of a student racecar the check before optimizing gives the following error: A fatal error has been detected during input processing: *** ERROR # 6001 *** Two of the vectors defined on DTPL card 1 are aligned. I don´t know what to do now. At the end of this text i add a dropbox link to my hm-file, so maybe someone of you can have a look and give me tipps to solve my prob. I guess it could be the connection between the beams (1D) and the design space (solid). i equivalenced them with the equivalence function (in menu SHIFT+F3) in compliance with a small warpage. Maybe the local vectors of the beams are incorrect now. I don´t have any idea. I hope there is someone can help me. greets, Thomas https://www.dropbox.com/s/evz55axqz5ru4r0/TEST_MOdell_7.hm?dl=0
  3. Dear Forum, I am trying to simulate a 3 point bending test of a composite beam. This beam has inner ribs to create more stiffness. But when the analysis runs, there is no stress/strain on these inner ribs. See picture What can I do to correct this. I first draw CAD geometry, using surfaces. I split the surfaces on the contact edge, to assure a proper t-junction edge. (Yellow edges in the picture) Then I import Geom; mesh ect (the rest is history). Thanks in advance Arne PS any other pointer are also welcome Mesh_1_Lam_Load.hm
  4. I'm currently working on a unit cell study (carbon fiber + matrix + additives). I thought it would be very easy to mesh it out and run my test, but I've been spending too much time in determining good quality of mesh. I have 3 components (3 different solids) that need to be meshed. I was able to successfully tetra-mesh individual solids with curvature and proximity, but couldn't find the way to somehow connect them. I tried to re-mesh multiple times with 2D automesh to tetra mesh technique, translating surface meshes to another, assigning equivelent on the duplicated nodes, etc. But frankly, it's too time consuming to accomplish good quality mesh, and I can't spend more time in this part. Later on I found the contact surface method preventing the penetration between parts by assigning slave and master BCs on shared surfaces (i.e. outter surface of carbon fiber and inner surface of matrix). Please give me some advice whether node connectivity can be replaced by assigning contact surface. My one concern is that later on I'll have to check the carbon fiber penetration in a reality scenario, and this method won't work for that due to the slave/matster bounded condition. If node connectivity must be properly done (which I assume..), please provide me some type of tutorials that present about connecting "multiple solids". I've went thru lot of meshing tutorials but only found the ones for single component/part or simple geometry setup that can be easily automeshed/translated/rotated.. Figure displays the carbon fiber (purple) and matrix (gray) nodes are not connected. Figure 2 displays the contact surface BCs applied on the shared surfaces of carbon fiber and matrix. Please excuse that I am not allowed to upload the model.. Your help would be really appreciated.
  5. Hello everyone, I was wondering if there is a way to export a .txt file with the connectivity of all the elements on a model. For example: My model is made of CQUAD4 elements only. The ideal output would be a list like this: ELEMENT_ID,CONNECTION_1,CONNECTION_2,CONNECTION_3,CONNECTION_4 With CONNECTION_X being: CONNECTION_1 - Element connected to G1-G2 CONNECTION_2 - Element connected to G2-G3 CONNECTION_3 - Element connected to G3-G4 CONNECTION_4 - Element connected to G4-G1 If there was no element connected, CONNECTION_X would be 0 (for example) I've tried to assemble this connectivity matrix based on the bulk data exported by Hypermesh using MATLAB(it's the only language I'm comfortable with) using the CQUAD entry to go element by element and then search the whole list to find which element is connected to each side. But since the elements on Hypermesh don't have the same orientation, the whole process doesn't finish.. Can anyone help me with this? Thank you very much!
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