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aecyd

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About aecyd

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  1. Dear AECYD

    I am a student of Mechanical Engineering in Pune, and i participate in Formula Student events. Currently I am designing a CFRP component and I need your help in its composite dynamic analysis.

    To do the post-processing of this part in HyperCrash, I would need a RADIOSS import file.

    So my question is, “How can I create a ply-based composite part in RADIOSS?”

    I am using HyperWorks V12.0, so, if possible, please advise the card images for material and property accordingly.

     

    Yours sincerely,

    Hamdaan Shaikh

  2. Hi, I have a problem with contact analysis. My model is working fine in one direction (let's forget about the connection between the bearing and the gearbox), i.e. the bearing pushes away the flange. However, if I change the direction of the force, in which case the bearing should slip out and has no effect on anything, the bearing still pulls the flange. What do I have to modify to make the bearing available to push the flange but not pull? Thank you aecyd bolted_flange.zip
  3. Hi, I have similar problem. In this case the model is working fine (let's forget about the connection between the bearing and the gearbox), i.e. the bearing pushes away the flange. However, if I change the direction of the force, in which case the bearing should slip out and has no effect on anything, the bearing still pulls the flange. What do I have to modify to make the bearing available to push the flange but not pull? Thank you aecyd bolted_flange.zip
  4. Hi, How can I export the laminate to an Excel file? Or if it is not possible, exporting the plies would be also helpful. Thank you, aecyd
  5. Hi, I have several load steps defined in a model, and sometimes I want to examine only one of them, but if I run the simulation, all the loads teps are calculated. How can I turn off a loadstep without deleting it? Thank you aecyd
  6. aecyd

    Tube welding

    This is only a dummy part, and in some cases I would have a more complicated model. Also, for example if I want to examine the displacement of a structure, therefore the quailty of welds are not important, and the process would take more time with meshing than applying a few connectors.
  7. Hi, I would like to connect the "bracing_1" to "bracing_2" and connect the "bracing_2" to "flange" component, representing a weld, without remeshing any of them. I've tried spot, seam and area connectors with various options but none of them worked, after running the simulation, the connected components weren't constrained together. What is the most simple method to connect components with non-connecting mesh? Thank you aecyd tubes.zip
  8. Hi, I have a surface model, which is created by PTC Creo freestyle module. This way it has a grid of splines which define small surfaces but the whole model still contains only one quilt. Then I divided the quilt into smaller quilts, this way these represent the geometries of plies for composite laminate stack up. My goal would be to import the part file into HyperMesh resulting in separate components, i.e. each component would represent one quilt. The problem is when I import it to HyperMesh (selecting STEP as file type and activating the "split component by body" option), it disconnects the surfaces (showing a red edge at the boundary of each quilt), and I have to equivalence the edges to get a continuous surface in HyperMesh, which I'm afraid of. Is there a way to import the model so the quilts are connected but each quilt still represent an own component? I could import the model as one component (resulting in continuous surface) and then move each quilt into a new component in HyperMesh, but it is more easier to operate with the geometry in a CAD system. The *.prt and STEP files are attached, but HM is unfortunately not compatible with Creo 3.0 Thank you Aecyd HW_Creo_test.zip
  9. Hi, I have the same propblem: I know I could use MAT9 for honeycomb structure if I had 3D elements, but I have only 2D elements that is why I have to use MAT8. How can I apply the material properties which I can find in any honeycomb material datasheet to the MAT8 material card? These are the material properties I can get from a honeycomb datasheet: Compressive strength Compressive modulus Shear strength 1 direction Shear modulus 1 direction Shear strength 2 direction Shear modulus 2 direction These are the material properties I can use for MAT8: E1 E2 NU12 G12 G1Z G2Z Xt Xc Yt Yc S
  10. I've just updated to 13.0.211. However, after you asked the version I tried it with the 13.0.98 version, and it works. That seems to be a serious bug in the new version
  11. Hi, I used to be able to set up a composite analysis in HyperMesh 12, but in HyperMesh 13 I can't retrieve the failure index results. I followed everything in the "OS-4050: Optimization of a Horizontal Tail Plane" tutorial, but no matter whether I use HILL or TSAI (actually I would like to use TSAI) failure criteria, after the run is completed, in there is no "Ply Failure" result in HyperView. I attached the file. Please rename the extension from *.txt to *.hm. Thank you Aecyd tail_baseline.txt
  12. Hi, I created a lattice optimized structure, and I would like to export it to an *.stl file, but first I would need to run OSSmooth on it. When I try to do so, HyperMesh says: "Invalid input file command. Please check logfile" I checked the logfile, where I found: "Warning: failed to detect topology optimization result, turn off isosurface Error: OSSmooth fail to detect optimization result. Abort." I turned off isosurface, but there is another error: "Invalid parameters string" No matter what I change in the settings of OSSmooth panel, I can't make it work. I attach the files as *txt, rename it to *.rar Thank you Zsombi upload.txt
  13. I still don't know how to export to *.stl, but I realized I have to use OSSmooth first. I tried it, but when I run OSSmooth, it also displays an error: "Invalid input file or command. Please check logfile" How can I make it work?
  14. Thank you very much, now it works:) Can you tell me how to export the component to an *.stl file? When I try to export it says "5640 elements not defined in the template."
  15. I have no idea how the model you received is shown on the picture, as I used the model you uploaded for me at the beginning, but now I created a new, simple model and I uploaded it to your dropbox with "bracket lattice" subject. Please check my model, I have the very same problem: there is no other *.fem file created after I run "bracket_export.fem" with Optistruct. Could there be some problem with the adding of "LATTICE 1 0.050 0.80" row as mentioned in the 12. page of the tutorial pdf?
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