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<p>Hello,</p><p>I am working on space debris capture simulation using nets. I gave the initial velocity generation for the net in the direction of debris, so that I can observe the capture mechanism. The debris is fixed in space so it cannot move. However, the issue is that the net is moving away from the debris, exactly in the direction opposite to whatever i gave it. I fixed the co-ordinate systems, and also tried giving velocity in multiple directions, but no matter what i do, the net keeps moving away from the debris. Does anyone know how to fix this? I am kind of stuck and would appreciate any help. Thank you!</p>

<p>Hello everyone,</p><p>I have the problem that my volumesh (2. Order Tet Elementform 17) looks normal in the preprocessing stage but looks distorted after being solved and the results (no Deformation) being loaded in the LS-PrePost Postprocessor. (Only fixed Boundarys, Implicit Dynamic). I dont know if this is only a Visualisation problem. Thank you for you help!</p><p>Picture in Preprocessor:</p><p></p><p>Picture in Postprocessor:</p><p></p>

<p></p><p>AThe first d3plot looks fine, but every one after the first one starts looking like this. I have tried resaving folders, or doing the setup again froms scratch. Is it a mesh issue? </p><p>I exported Ansys workbench mesh as .k file, then opened in prepost to run. It was working fine, then i made a mesh refinement and did the same thing, now regardless what i do, when i open the post, the plots look like this. As if the index of the mesh cells got messed up or something. I have plotted graphs of energy etc, so my simulation is definitely not blowing up to cause this.</p><p>ALE axisymmetric no Lagrange bodies.<br>Does anyone know what is going on? Any help would be appreciated!</p>

<p>Hi - I am running an FSI simulation and my ICFD mesh cannot initialize.  I have a very fine mesh and mesh controls, MESH_BL, ICFD_CONTROL_GAP and other controls for the FSI mesh.  I am running into this error. "</p><p><br> Implicit dynamics is now active<br> ICFD::Mesh -> Start Mesh Generation<br> ICFD::Mesh: Initializing.</p><p>===================================================================================<br>=   BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES<br>=   RANK 1 PID 3849779 RUNNING AT g040<br>=   KILLED BY SIGNAL: 9 (Killed)<br>===================================================================================</p><p> </p><p>I think it may be due to some of the folds in my parts (which is why I added the ICFD_CONTROL_GAP parameter). but I have not had this issue before until now. Any ideas? thanks</p>

<p>Hi, I am learning LY-DYNA for my debonding model. I have watched some tutorial videos with a simple geometry (two metal strips boneded with adhesive) under Mode I fracture.</p><p>Here is what I did. </p>3 Geometry: two metal blocks and a layer of adhesive.Using 'Commands', MAT_138 (renamed) was added. <p></p><p>3. After meshing, I added PART (Beta) and SECTION_SOLID under LS-DYNA (D5) tree. PART geometry was the adhesive layer selected. I selected '8-noded, 4 point cohesive element' as 'Element formulation option' under SECTION_SOLID.<br><br>When I checked the error message in 'messag' file, it shows</p><p>" *** Error 40310 (SOL+310)<br>     Part ID 3 specified material type 1<br>     is not available for the cohesive element"</p><p>Can anyone help me with this? </p>

<p>Hello,<br>I am trying to check the *CONSTRAINED_INTERPOLATION card in LS-PrePost v4.13.5, but some IDs (ICID, DNID, INID) are not displayed.</p><p>This issue also occurs in v4.12.11, but it does not occur in v4.11.14 or earlier versions.</p><p>Is there any way to display these IDs (ICID, DNID, INID)?</p><p></p>

<p>I am attempting to crush a block of MAT_63 Crushable foam between a completely constrained plate and a plate with 300kg mass. The simulation gives this output and the material just infinitely expands. Would anyone know any possible errors? Thanks.</p>

<p>I am trying to validate the results in a journal paper for my M.Tech thesis work, in which they have used a hybrid consititutive model added into the ls dyna subroutine. To recreate the same thing I need to add the user defined material. I have sucessfully installed the latest veersion intel fortran compiler and microsoft visual studio. What steps do I need to follw to implement the UMAT in ls dyna and compile the constitutive model code.</p>

<p>When I am using the workbench, there is no option of ALE bodies under model. So i thought that using the LS Prepost might work. So I have imported the mesh from the workbench together with the keyword file. Then I made ALE2D and so on.<br>The issue comes from material groups and used Volume fraction geometry to "patch" the bodies in the background domain. So firstly it needs some VOID parts, I have created them but it does not seem that Volume fraction geometry lets me input them. But for some reason presense of those eliminate the "cannot find void body" error. Then I am keep getting<br><br> *** Error 21153 (STR+1153)<br>     Flag BAMMG = 2 specified in card *INITIAL_VOLUME_FRACTION_GEOMETRY<br>     is out of range. It is an ALE AMMG ID and its value should<br>     be greater than 1 and less than 1.<br><br>I have tried switching the ID of the AMMG around, from 1 to 4, but it would only show up as 2, 22, or something. <br>Does anyone know what is going on? ID being greater than 1 and less than 1 means it cannot be 1, but it is not 1.<br><br>(The following pic is me putting BAMMG on 1, same error message) <br><br><br>I am just confused how would you run a axisymmetric ALE simulation in ls dyna in general, <br>I was thinking <br>1) make mesh in workbench since its easier and do all the setup that is avaliable <br>2) import into LS dyna and they all come as shell bodies due to unavaliability of ALE, change them all to ALE2D<br>3) use volume fraction geometry to patch them on the ALE background that we made before in workbench (already ALE2d)<br><br>Idk why this doesnt work. <br>The issue of me not making mesh in ls dyna is because the shape I am tyring to run is irregular, and very hard to draw in ls dyna. <br>Do i need to do something with the axis of symmetry? Doesn't it already transfer write together with the workbench written k file? What about boundary? </p>

<p>Hello! I'm a senior engineering student, looking for help with a school project. I need to know if I can use LS-Dyna to model a puncture test of a composite wall. First, whether LS-Dyna can handle the intricacies of modeling a fabric-matrix composite, and second, whether I can use FEA to model a puncture test of said composite. Any help or guidance here would be greatly appreciated. Thanks!</p>