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Pranav Hari

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Everything posted by Pranav Hari

  1. Hi Pressure loads are always applied normal to surface irrespective of the feature. you can either select the element along the curved surface or if you are using 3D element then select the face and apply.
  2. Hi j8jang I think you can use Mat law 12 in Radioss which describes a solid material using the Tsai-Wu formulation that is usually used to model composites. This material is assumed to be 3D orthotropic-elastic before the Tsai-Wu criterion is reached. if you are using shell elements then you can use Mat law 25 which describes the composite shell and solid material using the Tsai-Wu formulation Refer Radioss reference guide where you will get more information regarding these material laws and the mechanical properties to be given as input. Also, have a look at the other composite material laws in Radioss
  3. Hi j8jang Due to wrongly assigned property cards to components, RADIOSS throws this error. Please check and ensure whether the components are assigned with the correct property cards. Assign PART card image to components and NONE to rigids. Also, try the below suggestion and check if you still get error ID 286: Goto 2D page>> ELEMTYPES>> make sure for 2D and 3D are as shown in the below image. If not change the tria3=SHELL3N and quad4=SHELL4N.
  4. Hi iwinphilip It depends on the type of optimization you need to perform. For optimization you need to organize the geometry in to design and non-design space. The non-design space resembles the constraining area where no design changes takes place. Have a look at the e-book about Optimization in which it is explained in detail. ( https://altairuniversity.com/free-ebooks-2/free-ebook-practical-aspects-of-structural-optimization-a-study-guide/) Also refer OptiStruct online help where you will get tutorials on optimization.
  5. Hi FABIOMUSICCO Upgrading your graphics card will solve this issue. Here are the recommended GPU's for HyperWorks HyperWorks_2017_Hardware_Recommendations_and_Certifications.pdf
  6. Hi VAL1 Have a check whether this forum post can help you.
  7. Hi gopal_rathore According to the e-book "Dynamic Analysis with OptiStruct" there are no such thumb rules. The natural frequencies and normal modes of a structure can be a function of the load and the damping present on the system. A system with N DOFs will have N natural frequencies. Have a look at the e-book (page 77) modal transient analysis is described in detail with a tutorial. https://altairuniversity.com/free-ebook-learn-dynamic-analysis-with-altair-optistruct/
  8. Hi Sritej Kalas While creating the loadstep, change the analysis type to complex eigen. I also recommend you to upgrade your version of OptiStruct Have a look at these 2 tutorials from OptiStruct help which is similar to your case.
  9. Hi Julio Also, try geometry > surface edit > extend. Select all the surface and click on extend
  10. Hi harshitpuri I recommend you to update to the latest version of HyperMesh and try again
  11. Hi harshitpuri Have you checked this example file from Radioss help? In this example, type 16 & 17 interfaces are used. gears.zip
  12. Hi WRCpce2018 If you want to re-analysis the optimized shape, you can use the OSSMOOTH option from Post > OSSmooth. After you have completed your run, you will get the .sh file from your run directory. The .sh file has the attributes of the new shape.
  13. Hi cemreyvz Can you please send a screenshot of your error or the model
  14. Hi Sumit Patil Can you please explain more about the error
  15. Hi Beginner93 You can do a quality check in Hypermesh to see whether your mesh has passed it. Tools > Check elems Have a look at the e-book "Practical aspects of finite element simulation'" (https://altairuniversity.com/free-ebooks-2/free-ebook-practical-aspects-of-finite-element-simulation-a-study-guide/) Refer page 309 where element quality checks are explained in detail
  16. Hi Madhura 1. Right click on the model browser and click create a curve. 2. click "new" and create a new curve. Change the option to /Table/1 . 3. Close all other windows and select the curve you just created from the model browser. change the options as in the image below. click on data:Ifunc and enter the values in the popup dialogue box 4. There will be 3 fields to define. Ifunc, Strain rate (Ai) and Temp (Bi). HM lists this as Ifunc, V(0), V(1). 5. Now you can assign this curve from the material data: Table_ID Hope it is clear...
  17. Hi mabefa Doing an equivalence is the best option or you can manually replace the nodes through 1D > Replace
  18. Hi Cnaaaaa Unfortunately, this is currently not possible in OptiStruct or Radioss. Composites are not supported in transient heat transfer. it is planned for the version of HW 2019.
  19. Hi volkanyildirim48 Once the STL file has been imported you can then use Geom > surfaces from FE and select the highest complexity in this panel > select the elements to create surfaces from STL, hence you can create geometry from stl. To directly solid mesh your STL you can use ShrinkWrap also You can achieve a good tetramesh for all purposes, using the Shrink Wrap panel. The shrink wrap can generally be used as a quick mechanism to generate solid meshes. 1. Go to 2D > Shrink Wrap panel. 2. Here there is an option generate solid mesh – this will produce an all-hexa or all-tetra mesh based on the selected elements or geometry. 3. Make sure the generate solid mesh checkbox is active 4. This will expose a tet collapse input, please try several input values depending on your quality requirements. Check this forum post too..
  20. Hi michel Can you try this in Radioss? Defining such contacts and interface is easier in Radioss. You can also refer the tutorial RD-T 3595 from Radioss help, which is similar to your case
  21. Hi rrishav This TCL gives you the output for Material Name, Card Image, E, Nu, Rho, G. I think you can modify this as per your requirement. GetMatProperties.tcl
  22. Hi VAL1 It is possible if you use an orthotropic material card. According to online help MAT 3 has the capability to apply youngs modulus in different directions. Have a check at the different card capabilities from the online help
  23. Hi RKHOMES Try relaunching HyperMesh after deleting the settings file.
  24. Hi vishruthdilip I tried opening the files. It worked fine at my end. However, the error message appears. Try deleting the card which is marked on the image, export it as .rad file and import the new file again. This should import without any error message
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