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Found 10 results

  1. Hello, I have few penta elements in my model. I was curious whether I can assign Thick shell property to this elements or do I need only hex elements for those? Thanks and regards, Bharat
  2. How to model an accelerometer in hypermesh with LsDyna solver for pedestrian head impactor model??
  3. Hello! I performed FSI analysis in LS Dyna using ICFD and CESE solvers. Problem is that HyperView cannot read the D3PLOT results file properly and not showing fluid domain mesh. Is it possible at all to post-processing CFD results from Dyna in HyperView?
  4. Hello, everyone. Recently I am very confused by the material angle defined by B1, B2, B3 in *section_shell and by AOPT in material model card. For example, in my research case, there are three through thickness integration points that represent three different fiber tows (t1, t2, t3). The three fiber tows have different constituents equations and different material angles (+60/0/-60). A right represent is shown in figure 1 (a). Then I defined their AOPT respectively shown in Figure 2. Figure 1 Figure 2 Then if I also make icomp=1 and give 60/0/-60for B1, B2 and B3 as shown in Figure 3, then what's the relation between figure 2 and figure 3. I don't know if this is right? I am worried about whether the material angle is right. Because it will influence the results a lot. Figure 3 Thank you for your patience. We can discuss here. I am eagle to hear your advice. Thanks.
  5. Hi, I have the problem, that I have some curvout data from LS-Dyna simulations. Hypergraph/Hyperview cannot open or plot the curvout data neither from the binout file nor the Ascii-file. Has anyone used curvout data before? Attached you find a sample of the curvout file. It is very simple, even more simple than most of the other LS-Dyna Ascii-files ... Christian curvout
  6. Hi, when i am importing a ls-dyna deck to hm and have *PART_INERTIAs present, i always get the following warning: "Warning: IRCS value for PART id 11000002 is changed from 0 to 1 i.e the inertias are changed from Global to Local axis and also aligned to the principal axis" I do not want this to happen... how can i change this, so that hm will not modify the inertial properties at all??
  7. I WANT TO KNOW HOW TO SOLVE THIS PROBLEM wedwef.avi I KNOW PROBLEM IS IN JOINT WHAT IS SOLUTION? WHY ITS COMES LIKES THIS
  8. what is time step? explain briefly. how to calculate time step from the time?
  9. Hello, I need some help to perform the frequency analysis using Optistruct profile in Ls-dyna as a solver. Input : Impulse excitation, A medium impact hammer with a soft tip (uniform input out of 50Hz) shall be used Impact in the fore/aft direction , next to accelerometer. Change the accelerometer orientation to lateral,and impact the it in the lateral direction. Output. Aquire data out to at least 50Hz with frequency delta as close to 0.25Hz as possible. (modal frequency in all X, Y, Z direction) How can i apply these inputs in my product, which dyna card ? any tutorial ? Please let me know if i missed some input info. Thanks a lot in advance..
  10. Hi As part of my thesis at the University, i am working with a simulation dummy from LSTC. I also looked at the tutorial on the positioning of dummies (HM-4640 Dummy Positioning), but unfortunately I could not find this dummy panel on the analysis page. Does this feature require an extension of the license or do I have to make some presets in HyperMesh? Best regards, J.Lauer
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