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About lerik

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  1. I have this two perpendicular surfaces (with diferent mesh, laminates and property) and I want to joint each other for the common edge. Is it correct to use CONTACT freeze (selecting the whole surface) ? Or I should use another thing?
  2. In case of using rigid elements, I have to join element by element during all the edge of contact or there is some kind of operation that do this? In the other hand, I don't know how it works the contact (freeze). I tried to use it several times to join surfaces and sometimes without having a direct contact between the two surfaces the program creates an union as if they were welded at a distance. Thank for your reply
  3. I want to join two perpendicular surfaces, each one have a diferent laminate, and I don't know how to do it. I need to use contact surfaces (freeze, stick..)? Rigid elements (RBE2, RBE3)? Welds? Each surface correspond to a carbon fiber laminate and it would be built as a single piece of carbon fiber. The only thing that it would be diferent between the two laminates (surfaces) is the number of plies. The two sufaces have a diferent mesh to creat the diferent laminates. Thanks
  4. I only have this options. Can I do it with any of this types?
  5. Thank you for your reply Farouk Maaboudallah, the problem is that I don't have the non linear quasi static type in my panel options and as a consequence, I think, I don't have the CNTNLSUB entry. Do you KNow what can I do? Thanks
  6. If I use the non liner static type, I have the following error: *** ERROR # 941 *** NON-CONVERGENT NONLINEAR ITERATIONS FOR SUBCASE 1 Suggestions: * Large nonlinear errors indicate that the model may have insufficient support - check the data (ideally the model should be stable without gap elements). Or try stabilized version of expert system: PARAM,EXPERTNL,CNTSTB. I forgot to comment that I want to calculate the displacement between two surfaces (one with solid elements and the other one with surfaces) joined by a bolt and having a coefficient of friction between them.
  7. I want to apply a pretension in a 1D bolt and i need to define a new load step. I have seen in some tutorials that i should define a new load step with the type --> non linear quasi static. I am using hypermesh optistruct 2019 and I don't know why I don't have this type in my options. I am doing something wrong? I have other options to define this bolt pretension?
  8. I tried with another file and it changed the results, I don't know why it doesn't work with the first model...
  9. I want to ask why I have the same results in the simulations even changing the Z0 option (from TOP to the BOTTOM) of my model. Does the position of Z0 have a real influence in the analysis results? Or is it only a visualization mode? If not, how can I really change the position (offset) of my laminate with respect to the import surface?
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