Jump to content


  • Content Count

  • Joined

  • Last visited

Everything posted by Atakanerg

  1. Please do not mess up the topic.
  2. Thank you Rahul for your explanation. I understood "initial gap" and "clearance" terms. But there are 2 more term that is not really clear in my mind. 1. GPAD : "“Padding” of master or slave objects to account for additional layers, such as shell thickness, etc. This value is subtracted from contact gap opening as calculated from location of nodes." - The thing I wonder about this is : Hypermesh Help says if we use "THICK" selection for GPAD, it accounts for shell thicknesses, but shouldn't it already account for the thickness? If we turn back to the example I asked before, we have two shell components (one slave one master), initial gap is 5 mm, shell thicknesses are 2 mm for each. As I understood from the above explanation, If I do not turn GPAD on, they will get into contact when they move 5mm totally. If I choose THICK for GPAD, then they will get into contact after 3 mm of movement. But what changes between these situations? (I think the shell thicknesses should be taken into consideration in default) 2. SRCHDIS: "Search Distance" - What is the important point about search distance? Why should I change that value? And what must be the best search distance for different situations - is there a criteria? Thanks for anybody who helped and will help.
  3. Thank you for your reply Mario. I have already read comment 11, but i still don't understand something. I am so new to contact algorithms, so apologise me if I am asking a very easy question. The thing I wonder is: Is the contact mechanism working like this: there are 2 contact surfaces (slave and master), there is a distance between them (for example 5 mm), if I do not use clearance, they will not see each other until they move 5 mm to each other. If I use a clearance of 5, they will immediately get into contact. Is that right? If I am wrong, please explain the mechanism for me with the way I explained. I mean in a non-formal way Thanks again.
  4. Hello everyone, I would like to learn the duty of "clearance" in PCONT card. In Hypermesh help it says: "Prescribed initial gap opening between master and slave, irrespective of the actual distance between the nodes."; but that does not explain anything for me. Could anybody tell me in a detailed way, what happens when i use clearance section in PCONT card for contacts. Thanks in advance.
  5. Hello all, In Hypermesh, Geom - "surface edit" sub-panel, while using self intersecting surfs selection of "trim with surfs/plane" radio button, it deletes any overlapping surfaces. I want to keep overlapping surfaces while using this trimming method. Does anybody have an idea about how to do that? Note: Changing autocleanup settings doesn't help.
  6. Thank you Prakash. I have realized that MAT/LAW28 is usable under Engineering Solutions/Crash user profile. Can I use this material type, but apply a static analysis?
  7. I was also looking for the same problem and came across this : http://www.altairhyperworks.com/hwhelp/Altair/hw12.0/help/hwsolvers/hwsolvers.aspx?mathoneycomb.htm But, the problem is, in Hypermesh, there is not a material type called LAW28, there are only MAT1... MAT8 etc. I couldn't find which one corresponds to MAT/LAW28. Does anybody have an idea about that?
  8. Chandru, what about having different ply colours? Do your plys have different colours? If you didn't choose diff. colours for them, you cannot see. (I know my answer may seem so simple, but people do that mistake)
  9. After the analysis, when you click display results, Hyperworks open all h3d files related to the analysis. You should choose the one related to the loadstep you are wondering. After clicking contour, you should choose displacement or stress, then from the rightern side, you should choose display method (simple, advanced etc), then you should click "apply".
  10. Hi Mac; For the question about adhesive between laminates, there is "inter laminate shear stress" option. You can define it as maximum shear that can occur between laminates before tearing. It is in card edit of PCOMPP property card. And for bolt preload, I am not exactly sure but you may use distributing coupling and give this force to that coupling. Hope that helps.
  11. Did you change element colour mode from "by comp" to "by prop" ?
  12. Raghav, I understood from your answer that you want to model the behaviour of the particulate composite. I mean, you don't know the properties of the composite, but you know the properties of the particles and matrix. Am I right?
  13. Anton is right. You should use 2D model while working with composites.
  14. Hi; Particulate composites can be modeled as linear and isotropic material. Thus, you can use MAT1 card. Atakan
  15. I don't know if I get it true, but if I do, it is so easy. Just right click on the related property, and choose card edit. You can change the thickness by clicking T value and inserting a new number. Regards, Atakan
  16. Hi everyone; I want to know if we are able to use composite fabrics in composite optimisation? I mean, composite fabric = a layer that consist of different oriented fibers and sewed together. Composite manufacturers sell them like this. In all hypermesh composite optimisation tutorials, they use individual plies which are fibers in one direction only. I want to use different fabrics (one is 45,-45,90 - 600 grams and 0.5mm - the other is 45,-45,60,-60 800 grams and 0.75mm for example), and conduct free-size, size and shuffling optimisations using these fabrics. Does anyone know how to do this? Thanks in advance for anyone replies.
  • Create New...