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Found 402 results

  1. Hi, I`m writing my master thesis and I need an help with tutorial HS 4200. I`ve done all the tutorial and I`ve found the parameters shown in the pdf. I`d like to print a comparison plot experimental data vs fitted curve, but I can`t do it. I tried to recover strain and stress in hyperview, but they are different from the experimental stress/strain. Please help me!
  2. Dear All, I am simulating the contact behaviour of gear with Radioss. I had given time step equal to 0.1 sec is it sufficient for this type of problem?? My stress level is exceeding my yield limit, also Its taking too much time to simulate the analysis may i get any tip to reduce my cycle time and suggestion on cycle time. Please refer attached file for same. I applied 80 Nm moment alongcentral axis and fixed the gear to simulate stress due to initial torque. Symmetric_model.hm
  3. Hello, I am currently doing a drop test and the design is failing way bad than the actual object. I think this is because in actual drop test, the concrete ground absorbs certain energy. In the simulation I used RWALL which won't absorb any energy. So is there any other wall that absorbs energy?
  4. Would some one help please I want to make this geometry mappable
  5. Hi, I am trying to convert Abaqus to Radioss block format. When doing so, I am facing an error ("Error: 0"). I have attached the images with this post. I have checked the ABAQUS input file and could find no error in it. Is this happening due to any other issue? Thanks in advance for your help. Regards.
  6. Hello, I am trying to make an analysis in radioss, where a small composite uav is caught in a barrier net. After searching for something similar to what I am trying to do, I found the document attached below but,but, as I am new to this Hyperworks module, I don't know where to start. Can someone help? Thanks. Hawk T Mk2 - Arrestor Barrier (BAN MK2) Engagement Analysis.pdf
  7. Hi everyone I'm performing crash analysis with radioss using units [ms], [mm], [kg], [kN]. I' ve added an accelerometer on the vehicle and I was trying to understand in what kind of units is the output of the acceletometer itself, because I get different values from the acceleration I get as double derivative of the displacement of the same point. Thanks for the help
  8. Hello everyone! Why am I not able to see new engine keywords introduced in RADIOSS 140 For Eg, /ANIM/BRICK/TDEL, etc. ? Secondly, How do i see the output of user defined law in /ANIM/BRICK/ ? As per the manual I should be able to select USRi - Variable of user law (i =1 to 18) but unfortunately its not visible in my /ANIM/BRICK/ output card. Can someone please guide me through this ? Thank you very much. Regards Avi
  9. I have received this error message. I read that I have to do the following settings for proprty of plastic I have activated the ENG/DT/BRICK CST as well and set Tscale and T min as follwing (are the valuses for Tscale and T min correct?) but I still get the same error. Would you please check my attached model and see what is wrong? Thanks a lot in advance type7_4.hm Quote Edit Prakash Pagadala Advanced Member Administrators 106 2034 posts Country India Are you University user?:No Posted 10 hours ago · Report post Hi, Please refer to the following posts: Thanks for your reply Prakash. I am using Radioss block 120 and I am using Hexa elements. So I read the posts you have refered before but they didn't help me. I have used M36 Plas TAB plastic and I have used P14 SOLID as card image. What should be the values for ISOLID ? Ismstr ? Icpre ? I have activated DT/Brick/CST in control card what shoulbe the values for Tscale and Tmin is it ok to use hexa elements here or do I have to switch to tetra. (As I read before tetra elements are stiffer than hexa. Does it help to switch to tetra?) Thanks for your help
  10. Hi there, i ran an composite optimization in Optistruct and now i want to analyse if the Geometry fails in RADIOSS because the Failure Criterion (PUCK) isn't available in optistruct. Anybody knows how to do that?
  11. Hi everyone, I want to use nonlinear material for my drop test. i have stress - strain curve. i want to know how can this be brought into Radioss ? also I want to have plastic strain among the results , i cannot find strain variable on anim tab . please let me how can i have plastic strain as result.
  12. I'm running a crash simulation in Radioss and I have requested a T file to be written. When I try and load the T file (T01) in hyperview and in hypergraph an error comes up saying it was unable to recognise it. I set the type to 0 default and I also tried 4 because I believe hypergraph can read that. I think data is being written to the file because the file size is fairly large. Any help would be appreciated. _ront_bumper.crashT01
  13. Hi everyone, could someone help me with composites simulation? I'd like to understand the difference between material law 25 and 58 to make the better choice for my simulation: in attach the data sheet of the material. If someone have theoretical and pratical (tutorial) material could shear it? Many thanks in advance Marta Tepex_Dynalite __102RG600__PA.pdf
  14. Hello, I want to simulate when load which is beyond the load which can glass take. glass will shatter. please suggest me any tutorial. Thanks in advance
  15. Mrt

    contact

    Hello all! What is the best way for contact interaction with small penetration? But reaally, i don't see penetration penetration checker doesn't see this too. but in post processor i have the spurious forces. i have a manual-crash book. i have tried to use approaches from this book, but i have had fail. if i do type 7 all settings default i will no contact interaction untill i have large displacement. i need advice and approach!=) thanks for help. 1.avi 1_0000.rad 1_0001.rad
  16. Hi, I am running impact analysis in radioss and need to know the strain energy of few component. Please let me know how to request for strain energy by parts in control card/Engine keyword (Radioss Interface) Thanks Ramesh
  17. I wish to do an impact analysis of the CRPF tube, I was just not able to understand how to do it in RADIOSS. I have used Hypermesh - Optistruct and I know about properties like PCOMP, PCOMPP. But I'm not sure what model setup should I use in RADIOSS. IMPACT_ANALYSIS_OF_CRPF_tube.pdf
  18. Hi all, I am trying to simulate the impact on a impact attenuator to be used in FSAE competition. I have referred the steps followed in the video by Altair,on YouTube,regarding the same.How ever i am facing the error during the solving time,it shows the following error,in RADIOSS Solver ERROR ==> NO RESTART FILE ERROR ID : 88 ** ERROR : TIED INTERFACE WARNING ID : 312 Could you please help me with this issue? I have attached the .out file AND .rad file also. Thank you. Run_3_0000.out
  19. Dear All, How to assign all number cores to run simulation. Will Number of cores affect simulation time? I doubled the RAM (previous 8GB, Now 16GB) , but there is no change in simulation time.
  20. Dear, All, I have finished with meshing, material assignment and contact definition in Radioss. want to predict, push-in and pull off force required to insert and remove male part in/from female part. Can anyone please revert with the procedure for the same.
  21. Dear All, I want to calculate press in force required to push the bearing outer ring into the housing using pressing dolly. I have defined contact between pressing dolly and outer ring; outer ring and housing. Is that pressing force is contact force between pressing dolly and outer ring ?? Need your opinion for the same. (I’m using Radioss for this analysis) Also, Is it possible to do above analysis at -30 degrees surrounding temperature? Please revert with the above queries.
  22. Dear All, how to apply rotational velocity to any component and if possible please revert with loading conditions necessary for below analysis.
  23. 板構造であれば構造全体にType7インターフェースを設定する事で、多くの場合、接触の問題は十分に対応できますが、Type7インターフェースは、あくまでも面と点の接触であるため、シェルのエッジやとがったソリッドの先端が接触するような場合、面と点はまだ接触していなくても、要素同士で見ると貫通が生ずることが起こり得ます。これに対応するエッジ接触がType11インターフェースです。 Type11インターフェースでは線(エッジ)と線(エッジ)の接触を取り扱います。線と成り得るのは、ビーム、トラス、スプリングといった線要素と、シェル、ソリッドの辺(エッジ)です。 接触のアルゴリズムとしては、線と線の接触である、と言う点を除けばType7と同じです。各線からギャップを考慮し、線同士の距離がその範囲に入ったときに接触と判断されます。こうして、シェルのエッジ同士等の接触を取り扱うことができますが、接触の相手の検索の効率がType7程は高くないため、Type7のように全体に与える、といった事はせずに、エッジ接触が起こりそうな部分のみに設定するようにします。
  24. Hello together, At the moment I am working on impact simulations in Radioss. I have an aluminium cylinder (solid elements, MAT Law 2, Initial Velocity) impacting a rigid wall. The total energy (TE = KE + IE) should be constant, but there is a jump in the curve. The DTE curve remains constant. The external work shows a decrease, too. Is my simulation correct? Should i use the DTE curve instead of the TE curve for validation?
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