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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 

George P Johnson

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About George P Johnson

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  1. Hi Karthic, You can create an output block (Analysis>>Output block>>select node from the the option) for the node, and provide the required output request, that is REACX, REACY or REACZ which are the X, Y and Z X reaction force on the node. Please go through /TH/NODE in the Help Menu which explains about the various output variables available for the time history for nodes. You can also go through this webinar which shows creating output blocks in RADIOSS: https://www.youtube.com/watch?v=Ef7Spn-j7fA&index=6&list=PL1u26y75SCrA_BOCLaSewVCNY7xRvCTnA
  2. Sir,

    I am doing a rollover analysis of a bus, for that i have given initial velocity as 10mm/s in the SET, but its just deforming at the place where the velocity is given

    Can u just help me out on what I should do to make the bus rollover on the platform.



  3. Hi, Once the user profile is selected as OptiStruct, the HyperMesh interface is loaded for the same. The active user profile will be displayed in the top of the HyperMesh window. We cannot select OptiStruct from Applications menu and so it will be always grey. You can continue working after selecting OptiStruct user profile. Many video tutorials on OptiStruct are available at https://www.youtube.com/user/HyperWorksUniversity/search?query=optistruct . A simple tutorial and the model file is also attached for reference. Tutorial.pdf plate_hole.hm
  4. Hi, Choose OptiStruct from the user profile, so that the FE solver interface for OptiStruct will be loaded. The active user profile will be displayed in the top of the HyperMesh window.
  5. Hi Akhil, We are working on your query and will update you very soon.
  6. Hi, You can define a vector in this material card and based on this vector the orientation will be updated for the plies defined.
  7. Hi Alice, Sigma_cut is the tensile cut-off stress,that is we are limiting the tensile stress to remain at a cut off value.
  8. Hi, In /PROP/TYPE10 property card the number of layers is specified in the N field. Then the same number of field (phi) is open to input the angle of each ply. Please review the sample property card attached.
  9. Hi Shriram, From Analysis> select output block and choose comps from the selection menu and select all the parts, and thereby you can plot the time history for parts. Please view this video tutorial at https://www.youtube.com/watch?v=Ef7Spn-j7fA&index=6&list=PL1u26y75SCrA_BOCLaSewVCNY7xRvCTnA where all these steps are shown.
  10. Hi Alice, When modeling low-density foams, it is important to consider potential failure under tensile loading. Tensile cut-off stress (sigma_cut) is to input a limiting stress which essentially models a elastic-perfectly plastic behavior in tension. I recommend you to refer about Ogden and Mooney-Rivlin model in RADIOSS Theory Manual where the formulation is explained. And many open sources on this material model are available in the web.
  11. Hi Alice, You can also go through this video at https://altair-2.wistia.com/medias/v3bvgnw89l which is a webinar on modelling rigid bodies in RADIOSS.
  12. Hi, Please go through Composite Properties topic in the Help Menu where different modeling methods for composites are explained, which includes defining plies where user can specify different material direction.
  13. Hi, You can convert the RADIOSS model into Dyna using HyperCrash. Make sure you are using the latest HyperCrash 17.0 for the best translation. Start HyperCrash and pick the LS Dyna user profile. After HyperCrash starts, go to File>>Import>>RADIOSS, and select your RADIOSS model. During import HyperCrash will convert the model to Dyna. Meanwhile, please go through http://www.altairuniversity.com/learning-library/2017-winter-directed-learning-webinar-series-crash-analysis-with-radioss/ which is a webinar on Crash Analysis with RADIOSS. All the major aspects related to crash analysis and post processing the results are covered here.And it also showcases the accuracy,robustness and reputability of the RADIOSS solver in the industry.
  14. Hi, Please go through the Help Menu on /TH/SHEL which explains about Time History output variables for Shell Elements.