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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. 

JM Desrosiers

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  1. What's the main difference between /mat/law38 and /mat/law70?

    Allright thanks! I'll take a look! JM
  2. What's the main difference between /mat/law38 and /mat/law70?

    Hi George, Thanks for the fast response! I did download the model and it helped me understand a couple of things. I was just wondering, if the model is the exact same that the one in the case study that you provided (http://altairatc.com/europe/presentations/session10/session10_ford_schilling.pdf). In fact, the geometry looks different, but if everything else is the same, it's perfect for me. More precisely, if the model has the same material, the EPP, it's even better. Also, I have an additional question. I was wondering if in law 70, there were parameters to change the shear behavior of the foam. I ''played'' with some of them, but I don't have what I expected. In fact, in pure compression the model behaves like the experimental tests that are obviously in pure compression. However, when I run combined or oblique loading simulations (pure compression and shear), the forces are not the same. If you want more precision on my problem, I'll share it to you. So, if you know some parameters that I can play with to get more of what i want or another tabulated law like 38 maybe, let me know! Thanks! JM
  3. What's the main difference between /mat/law38 and /mat/law70?

    Hi, still no tutorial about foam in Radioss? I'm waiting for it also Thanks! JM
  4. Missing job completed

    No, but I'm running on Linux, I don't know if it maybe in a processes that is not killed properly between each simulation. Thanks JM
  5. Missing job completed

    Hi, I got a problem with radioss recently. At the end of the simulation, it is not written "job completed" at usual. And in Hyperworks Solver Run manager, it is still written "running 1 job". So, when the 1st simulation is completed, the 2nd one does not start because of this. Can someone help me please!? Thanks JM

    Hi everyone, I got this error message «RADIOSS INTERNAL ERROR: S3N6» in Radioss window when I launch my file. And this error doesn't appear in the .out file. Any clue? Thanks JM
  7. How to stop an RIGID impactor that was lauched by initial velocity

    I got my answer from that question. Thanks!
  8. 1D element spring as real springs

    Thanks it's working!
  9. How to stop an RIGID impactor that was lauched by initial velocity

    Thanks for the response, I found nothing so that confirms my thoughts. JM
  10. 1D element spring as real springs

    Hi Vikas, I thought using this option, but I really need to lauch my hammer at a certain velocity (initial velocity). Therefore, I don't want to impose a displacement to the hammer. I only want to stop it by using a coil spring. But, maybe I can define a component which would be a coil spring and add a interface between the 1D coil spring and my 3D impactor? The coil spring would be at a certain distance from the initial position of the hammer. So the hammer will impact my dummy and be stopped after the impact at a certain distance. I don't know if I'm clear or not, but thanks for your response! JM
  11. Hi, I'm new to hypermesh and I have a simple question. Can I stop a component (impactor in my case) that was lauched by an initial velocity. I really need to keep the initial velocity. The problem is that the impactor is a rigidbody. I don't want to use another component which would be deformable to stop the impactor. I just want to stop it at a certain distance from its original position. I'm looking in the BCs, but I don't find anything that suits me. Thanks!
  12. 1D element spring as real springs

    Hi, I'm new to hypermesh and I have a simple question for you guys. Can we use a spring element to act like a real coil spring? In fact, I got an impactor hitting a dummy and in the real experiment, the impactor is stopped at a certain distance from it's initial position by a coil spring. I wanted to use a imposed displacement, but I need to keep the initial velocity to allow the impactor to slow down by transferring its energy to the dummy. So, I thought that maybe I can stop the impactor (which is rigidbody) by a spring element like it is in real experiment. Can I do that? Or is there something else I could do? So far, I wasn't able to use the spring correctly. Thank you very much!
  13. Time history node - Y intercept not equal to zero

    Oh ok the dummy is not supposed to move before the actual impact (hit by an impactor) but i'll take a look! Thanks!
  14. Hi everybody, I have a problem while I'm using a time history node to obtain the agular velocity at a specific area in my model. The problem is that in hypergraph, the Y-Intercept (at time = 0) is not equal to zero as it should be. In fact, my model is a simple impact and at time = 0, the impact has not started yet, but my agular velocities in every plane is not equal to zero (1.57143). is it a filter that I need to use? or something like that? Thank you! CompletT01
  15. Set up RADIOSS starter to read *.sta file

    Ok thanks! Its working