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Everything posted by ank

  1. Please explain by an example and any simple model?I am trying since many days but not able to connect shell and solid properly specially for moment case.
  2. ank


    How to create bolt connection between solid element and what thing we need to take care for doing so because i find videos and tutorial related to shell element only ?
  3. What is the exact meaning of this line?And how to tackle the error dm/m ?
  4. Which contact type is to be used for these body they are not welded only one is kept on other ?
  5. It mean these technique are not workable in radioss ?
  6. isolid 14 and 17 difrrence in P14SOLID ?I mean what is the effect and when to choice one over other ?
  7. How to do it i seen this in above pdf or It will not create penetration or intersection problem ?
  8. ank

    Too much stress

    conc. load(force) with triangular nature
  9. My load is for some small time period say 6 millisecond and i request result for stress result for 12 millisecond.My stresses values rises in later period drastically(almost at the end of 12 millisecond) .What can be the reason for this how i suppose to handle this problem? Thank you
  10. No problem like degree of freedom ?
  11. Is it correct to give tie contact between solid and surface contact.In optistruct and Type 2 contact in radioss ?
  12. ank


    What is problem if i have some penetration but i am able to run the analysis ?
  13. For 2017 version their is direct command to generate these stress and some basic results. Tools>engine file assistance>select create engine file>give some basic information and then done we are ready to export the engine file.
  14. Displacement is default. For stress and other results. Go to engine file and then animation file as shown in following figure.This is much useful for older versions before 13
  15. RD-2020: Direct Transient Dynamic Analysis of a Bracket
  16. Segmentation violation is general error and may be due to modelling error. RADIOSS writes out formatted output files from RADIOSS Starter and RADIOSS Engine. It can be *.STA file or a *.STY file. The purpose of the *.STA-file is to save the state of element and then make it possible to include it into a _0000.rad file for RADIOSS Starter.
  17. TYPE = SLIDE (default) will allow the contact surfaces to transfer pressure (contact closed), but it will not transfer anything under tension (contact open). For lateral forces, the SLIDE option will transfer loads until the sliding phase (lateral force > friction coefficient x pressure) TYPE=STICK is interpreted in OptiStruct as an enforced stick condition - such contact interfaces will not enter the sliding phase. The contact will still iterate to transfer pressures with an "infinite friction" coefficient and can also iterate to re-open, if tension forces occur at a later iteration (unlike the "no separation" option known from 3rd party solvers). TYPE=STICK is interpreted in OptiStruct as an enforced stick condition - such contact interfaces will not enter the sliding phase. Also, rotations at the slave node are matched to the rotations of the master patch. The FREEZE condition applies to all respective contact elements, no matter whether open or closed. This means basically, that the two contact surfaces are "glued" and will transfer all loads / motions between master and slave (also known as Tied Contact). Usecase is to connect two parts entirely.
  18. It is very general error and may be the error is due to contact.
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