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About Scap97

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  1. Thanks for the videos! Yes, I used a negative velocity in the z-axys (as I did for every other simulation), but this time my crashbox goes in the wrong direction. I don't know why this time I have this error
  2. I've made a simulation with this type of material as the others I made before, but, while I impose an initial velocity in the opposite direction my crashbox goes in the other way (as in figure below). There's something I miss? I use material type 33 and prop type 6. Thanks
  3. Now it's working; hoping everything goes ok. Thanks for help!! Another question about this: if I want to use an aluminium foam as the material for my crashbox, which material and property should I use?
  4. So according to the video I have to pick connecting elements (as in picture below) and use function "equivalence". I've tried doing like the video, but my node didn't highlight and the edges remain in the model. Is there something I miss?
  5. Thanks for help. Sorry for late reply. If I want to create continuum shell element in black circles area should I add some RBE2 in this zone or I read about solid shell element (HSEPH or Shell16) but I don't know how to create. What's the best configuration for creating continuity in these zones? Thanks for help
  6. Thanks for you help!! Now I have another problem, this time with contact interfaces (groups). Vertical surfaces pass through the ground (as it's represented in figure below). I used contact interfaces type 7 (multi usage) to connect the entire box with the ground. I can't understand while the lower parallel surface didn't show this problem while the vertical ones gives errors. For group that involves Impactor and Box I used type 2. Maybe Ground should be bigger than the box (now they are of the same external shape). Thanks
  7. So what I need to do is to create plies with angle ϕ an Ioth=1 for each different surface? After I create these plies, I have to use prop #11 (Sandwich shell) or I have to use prop #1 as you do? When I open your edit file (thanks for help!!), I found no plies and it returns to me an error due to incompability beetween Material type #2 and prop type #1. Could you please help me also this time? Thanks
  8. Yes! Thanks for help CarbonBox_0000.rad
  9. So your suggest is to create 6 different sets with 6 coupled systems? Thanks for help Edit: I tried creating a ply for each surface of my box (so I created a total of 8 different set). I created also 8 systems, one for each surface and I create the laminate. Once I launch the solver, I obtain the same errors but this time I found 600 error messages. Can you please help me finding the error. Thanks
  10. Hi, I'm trying to create a sort of box made of composite material (Mat 25: Composite Shell; Prop: Compp). The component is shown on attached file. When I create the laminate, HM shows me error id #197 ( REFERENCE DIRECTION IS ALMOST NORMAL TO SHELL ID=1600). This error is for only 400 elements while my component is made of almost 2000 elements. How can I correct this error. Thanks
  11. Hi, thanks for replying me! I tried using Failure Criteria (Chang) but I obtain only error #44 (abnormal error). I tried adding on Material description the TOTAL TENSILE FAILURE dir 1 and 2 to show me if some layer or element failed (using control card ANIM_SHELL_TENS_STRESS_ALL and ANIM_SHELL_TENS_STRAIN_ALL )...am I wrong? Thanks for the help
  12. Hi, I create a Material Law Type 25 (Orthotrophic Shell) and then create a Property law type 11 (Sandwich Shell). My Sandwich shell is made by 5 layer of the same material and I create it in property. I used Tsai-Wu failure model and I add all the "Yield Stress in direction 1-2 an 12"; while for "Total element failure criteria" I choose "0" option. How can I understand if my laminate will brake or not during the impact? I have to choose some particular control card? Another question: In post-processing to show the Von Mises stress I choose two different control cards: - ANIM_ELTYPE_RESTYPE -ANIM_SHELL_TENS_RESTYPE With first control card I obtain a stress of about 50 MPa while with the second one I obtained a stress of about 500 MPa. How can I understand which is the correct one? Thank you for the help!!
  13. Hi, I want to know if is possible to show the forces between a panel and an impactor during a drop test. I tryed using Th/Inter but the values I see in the plot (using Hyperview function CONTACT FORCES --> MAG) and the ones in the graph (using Hypergraph INTERFACE/THinter --> CONTACT INTERFACE "1" --> RESULTANT NORMAL FORCE) are very different! TH INTER shows the resultant force in all the contact surface? Hyperview function shows the local force in every single element? Hoping to receive an answer Thanks
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