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Found 3 results

  1. Hi, I am facing the following issues with Radioss run - Quasi Static analysis. 1) Without /DT/INTER/DEL in Engine file , the run has been stopped due to min time step error. 2) With /DT/INTER/DEL in Engine file the mass scaling DM/M is increasing gradually till 30% from 3.2% Let me know for comments to avoid this error Regards, Arul
  2. Hi all, I think the time step should be larger than the value setting in the /DT/NODA/CST. However, in my test, I found the time step sometimes smaller than this value. Why this happen? What's more, my case terminate with an error when using mass scaling. The case terminates normally without using keyword /DT/NODA/CST. What's the problem? I have uploaded my engine file and out file. /DT/NODA/CST 0.67 0.8E-4 Roy NewFoam5_1115_Old_FaceDrop_0001.rad NewFoam5_1115_Old_FaceDrop_0001.out
  3. Hello everyone. I would like to ask you for some information about difference between Spotflag 1 and 5 (0) in Interface type 2 (tied). I am running explicit model of front seat with lot of seam welds areas, for crash analysis. If i use spotflag 1 (optimized for spotwelds and rivets), mass scaling raises about 5% comparing to default formulation 0 (5). As far as i know spotflag 1 is recommended for spotwelds and for BRICK elements in master surface, what is not exactly my case. My connection is shell elements (master) and spring2N (slaves). So can you tell me, what are the differences between these spotlags, and which one should I use? I will also appreciate some kind of mathematical / physical interpretation if it is possible. Thank you very much in advance. Daniel
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