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JFormiga14

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  1. Thank you @Ivan! Do you know any way to take a graph force vs displacement to compare to the real test? Like using and incremental force or something like that
  2. Hi @Ivan could you send me the model with NLSTAT? And do you know if it is possible to do the laminate optimization process (free size, size and shuffle) using a non linear quasi static analysis? Thanks in advance
  3. @Rahul R i tried to change the distances between the elements because of the interception you talked about and the results change a little but not that much. Have you checked the .out i sent you?
  4. AS requested the .out file Ensaio Olhais_001.out
  5. Hi @Rahul R yes it is force vs displacement graph. This is a pull out so i'm thinking that the upper part of puxator could leave the surface with a really big force so because of that i put the contact only in the low part of puxator. So you think that i should take into account the layup thickness when making the contacts?
  6. Could anyone help me? @Ivan @Rahul Ponginan @Rahul R , sorry for tag you but i'm really stuck in this problem Thanks in advance
  7. Hello, I am simulating a pull out test. I built my model in accordance to some tutorials using a 3D mesh with mat9ort and PSolid to the honeycomb and two 2D mesh to the carbon fiber layers with mat8 and Pcompp. After the model is running i made a test specimen and test it. The problem is that my model is much more rigid than the real life (see the graph). To apply the force i use an eye screw and a backing plate that i had modeled too and used some contacts between the test rig and the plate and between the backing plate and the sandwich plate. These are the only constraints applyed to the sandwich plate. Could someone help me with this? I dont know why there is this difference between the model and the real test Attached is the model Ensaio_Olhais.hm
  8. Hi, i'm trying to model a 3 point bending in optistruct using a non linear quasi static analysis. My objective is compare with a real test. I'm modelling a sandwich structure exactly with the properties of the honeycomb and the carbon fiber laminate. The problem is that i want to use an increasing displacement like 2mm/minin the upper cilinder, the same as the real test. Is there any way to do that i already define the contacts between the cilinders and the plate? Thanks in advance
  9. What is considered to be inertial effects? Is like reduction of thickness in some points? Is it possible to model the honeycomb with the Material P9ORT, because the honeycomb have diferent resistance in compression axis and plane axis (Attached you can see the properties of the honeycomb)
  10. What do you think is the best option to do this with altair products (Optistruct or Radioss)
  11. Is what i have done. My objective is trying to simulate a traction test and obtain the displacement with an increasing force. I think its non linear but i'm not sure
  12. Thanks for your answers, i already solved the problem. The upper and bottom surface are not well conected. I have another question, what is the better material card for the core since it is an aluminium honeycomb? I am also interested in taking a force vs displacement curve of this with an increasing force. Is it possible to do in hypermesh? What should i do? Is there anything that i can check that help me doing that?
  13. Hey Guys, I'm trying to modelate what in formula student is called as a groove, this is a place where we take the core and unite the inner and outer layers of the monocoque (image below) To build my model i followed the steps: -Import a solid from the CAD, mesh the upper and bottom faces of the solid with a 2D mesh and then a 3D mesh to the solid; -Changed the upper and lower face to another component to create the plyes, create them and the laminate. -Create a property PSolid for the laminate and PComPP for the plyes; -Material for the core is a Mat1 and for the plies a Mat8 -The constraints and forces are in the image below. The force is applied in a rigid at a certain distance of the laminate The problem is when i run i have a displacement of 1e+10 and i don't understand why
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