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About Staedtlerp

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  1. Good evening all, I have tried to perform a structural analysis involving a pin and a slot. I have set up a Non Linear analysis with contact using small displacement (NLPARM). At the beginning the pin is not touching the slot, then It touches the slot and the contact start working. On the pin acts a LOADADD force (Fx+Fz), the other dof are blocked (rotations and traslation along y). Otherwise the slot is fixed (only traslations, no rotations because I think is unuseful). Attached you can find the model (Hypermesh 2017.2 model). I have set up a contact with a property type SLIDE and Discret N2S. Furthermore I have chosen the pin as master and the slot as slave. The problem is that after a bit it comes up with a result message (analysis completed), but it seems It hasn't performed all the increments I have set up. I think the results have not any sense. Could you please take a look at the model? Is that solution correct?? Furthermore, there is attached a screenshot of the run panel of Optistuct. In the upper right corner threre are the Iterations column and the Subcase column. I'm not able to understand why the Iteration or Subcase are not matching the number of increments I have set up (30). What are Non_EUI_st, GapClose_st, etc..?? Do I need to change contact parameters adding, for example, a contact property? Many thanks you very much for the your help and time Interfaces_single_harness_attachment_interface_contact_NonLinear.hm
  2. Hi guys, thank very much for your replies. I read the post from @Koushik Chandrashekhar but i didn't understand how to display mass values. Then I read the post from @Mario and I think It could be a great advice to recap mass values when using CONM2 elements. So, thank you very much to all. Is there anyone with other advices?
  3. Hi all guys, I'm modelling a platform with different devices linked to it. I modelled the devices as concentrated masses linked to platform with rbe2 elements. The problem is that, activating Display Element Handles, I can see the element type name (CONM2) but I can't see the mass value of each mass. Is there a way to display, along with the element type name, the associated mass value?? Thank you so much
  4. Thank you very much @Rahul R for your prompt reply and for the document. As far as I understand, selecting Composite Failure as result type the program allows you to check for the failure index of each ply or bond (infact It allows you to select, in the second drop-down menù, between Ply Failure and Bond Failure), instead, selecting Composite Failure Index as result type, the program allows you to check for the failure of the overall laminate (selecting the worst failure index across all plies and bonding layers). The laminate will fail if at least one ply fails. However, I don't understand why, selecting Composite Failure Index as result type, in the second drop down menù I can choose between Failure Index and Ply with Maximum FI. What does it means the second option? I can verify each ply failure index by selecting Composite failure as result type in the first drop-down menù. Is there any difference? Furthermore, by selecting Ply with Maximum FI in the second drop-down menù, I receive a numeric value very different from the Failure index of each ply? For example, in a simple problem I'm working on, the max failure index is 0.8 but, selecting Ply with Maximum FI, I receive a max value of 13. What does it means? Thank you very much
  5. Good morning all, I have a question about the visualization of results in a composite analysis. I performed a structural composite analysis and then I entered the Hyperview workbench in order to show results. In the result type I can choose between different options (composite stresses etc) and I found that Composite Failure and Composite Failure Index results are available. I don't understand the difference between these two options. Furthermore, a second drop down menù is willing under the first (see picture). If a choose Composite Failure, in the second drop-down menù I can choose between Ply Failure and Bond Failure, if I choose Composite Failure Index in the first menù I can choose between Failure Index and Ply(s) with Maximum FI in the second drop-down menù. Could somenone help me to understand? Does anyone know where to find the explanantion of all result types in the documentation? Thank you very much.
  6. Prakash Pagadala thank you so much Probably I made a mistake reading and studying the tutorial, but It is better to control to avoid misunderstandings
  7. @Q.Nguyen-Dai perfect and clear! thank you so much. I guess it could be a mistake in the tutorial that I mentioned. Thank you very much
  8. Prakash Pagadala Thank you very much. I think I'll do in this way, selecting the surface at which elements are associated. But I have a question: on the tutorial "Composite optimization of a skateboard with Optistruct", pag. 13, how are calculated pressures? It seems that the pressure is divided by the total number of elements.
  9. Sorry I couldn't be able to delete the tag...so, how is it the correct way to calculate pressure on each element? Thank you
  10. Hi Prakash, I have a question. Considering I have 100Kg applied on a surface of 1m^2. I have a pressure of 100 kg/m^2=981N/m^2=9,81*10^-4 MPa. The total number of elements is 200 so each one is 5mm^2. Why have I to divide the total pressure by the total number of elements?? To obtain the pressure on each element I guess I have to multiply the pressure (9,81*10^4 MPa) to the area of each element. Or not? Sorry I'm quite confused, I don't understand why I have to divide the pressure by the total number of elements. thank you.
  11. Great!! Thank you very much for your help. I'll put the values and I'll let you know. Thanks gain
  12. Hi Premenand, thank you for your reply. yes sure, below you can find the document downloaded directly from Hexcel supplier's site. Thank you HRH_10_eu.pdf
  13. Good morning all, I'm modeling a composite laminate made of carbon fiber layers and honeycomb. I'm modeling using the pshell elements and MAT8 card. The question is that I don't really know how to fill the material card entries. I'm using Nomex honeycomb and the properties provided by the supplier are those depicted in the attached photo. Using MAT8 I need 9 mechanical properties (E1, E2, NU12, G12, Xt, Yt, Xc, Yc, and S, excluding density) but I haven't got these properties and I don't know how to insert the properties provided by the supplier's datasheet. Can anyone help me?? Thank you very much
  14. @Premanand Suryavanshi thank a lot for the screenshot @Prakash Pagadala Sorry Prakash but I don't undestand. What does It means "It's the other way"? Is it the opposite, Tsai-Hill is used for each ply and Von Mises for the entire laminate?? Thank You
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