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<p><p class="MsoNormal">Hello there,</p><p class="MsoNormal">I have a model in which an indenter penetrates a cubic material. The indenter is a rigid body and the cube is SPH node. I also used a node_to_surface contact. For the penetration, I want the indenter to move downward for 5mm. So, I used the PRESCRIBED_MORION_RIGID and also defined a curve (for displacement, so x axis is time) as follows:</p><p class="MsoNormal">(0,0)</p><p class="MsoNormal">(1.1,-5)</p><p class="MsoNormal">The termination time is 1. The problem is that the indenter stuck in 2.5mm and does not move downward to 5mm which I applied. I have tried several contact parameters but no changes happened (still get stuck in 2.5). After that I tried the following displacement curve and time:</p><p class="MsoNormal">(0,0)</p><p class="MsoNormal">(1,-5)</p><p class="MsoNormal">(2.1,-5)</p><p class="MsoNormal">The termination time is 2. The output of this simulation was different and the indenter moved downward more that 2.5; however, it is now goes to 10mm. Which is more that the prescribed displacement in curve. </p><p class="MsoNormal">I would be very grateful if someone can help in this regard. Am I applying the displacement in a wrong way? Is the curve wrong? Do I understand the prescribed_motion_rigid keyword wrongly?</p><p class="MsoNormal">I do appreciate any feedback and advice. </p></p>
<p>Hello all,</p><p>I am trying to model prestressed concrete member and was wondering if you can help me with how to apply the prestressing force. I am using the mat cable for the strands which has an option of initial tensile force so thought that would be enough to apply. However some papers suggest using thermal method by introducing keywords such as MAT_ADD_THERMAL_EXPANSION and LOAD_THERMAL_LOAD. I am not sure which method is the correct way but if the second method is the one then I am getting error in the process. Please see attached screen shot for the first method.</p><p>Thanks for your help</p>
<p data-start="69" data-end="143">Hello,<br data-start="75" data-end="78">I encountered the following warning and would like to resolve it:</p><div class="contain-inline-size rounded-2xl corner-superellipse/1.1 relative bg-token-sidebar-surface-primary"><div class="sticky top-[calc(var(--sticky-padding-top)+9*var(--spacing))]"><div class="absolute end-0 bottom-0 flex h-9 items-center pe-2"><div class="bg-token-bg-elevated-secondary text-token-text-secondary flex items-center gap-4 rounded-sm px-2 font-sans text-xs">*** Warning 50186 (MPP+186)<br> segment contains rigid body nodes<br> tracked node ID = 40242<br> tied interface # = 10<br> segment nodes:<br> 56438 56522 56523 56439</div></div></div><div class="overflow-y-auto p-4" dir="ltr"> </div></div><p data-start="341" data-end="442">In fact, I used the <em data-start="361" data-end="397">Tie-Node-Surface-Constraint_Offset card to tie a solid element to a rigid body.</p>
<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>
azuma.toshiharu.g9@s.mail.nagoya-u.ac.jp
February 6, 2026
<p><p class="MsoNormal">Hello there,</p><p class="MsoNormal">I have a model in which an indenter penetrates a cubic material. The indenter is a rigid body and the cube is SPH node. I also used a node_to_surface contact. For the penetration, I want the indenter to move downward for 5mm. So, I used the PRESCRIBED_MORION_RIGID and also defined a curve (for displacement, so x axis is time) as follows:</p><p class="MsoNormal">(0,0)</p><p class="MsoNormal">(1.1,-5)</p><p class="MsoNormal">The termination time is 1. The problem is that the indenter stuck in 2.5mm and does not move downward to 5mm which I applied. I have tried several contact parameters but no changes happened (still get stuck in 2.5). After that I tried the following displacement curve and time:</p><p class="MsoNormal">(0,0)</p><p class="MsoNormal">(1,-5)</p><p class="MsoNormal">(2.1,-5)</p><p class="MsoNormal">The termination time is 2. The output of this simulation was different and the indenter moved downward more that 2.5; however, it is now goes to 10mm. Which is more that the prescribed displacement in curve. </p><p class="MsoNormal">I would be very grateful if someone can help in this regard. Am I applying the displacement in a wrong way? Is the curve wrong? Do I understand the prescribed_motion_rigid keyword wrongly?</p><p class="MsoNormal">I do appreciate any feedback and advice. </p></p>
<p>Hello all,</p><p>I am trying to model prestressed concrete member and was wondering if you can help me with how to apply the prestressing force. I am using the mat cable for the strands which has an option of initial tensile force so thought that would be enough to apply. However some papers suggest using thermal method by introducing keywords such as MAT_ADD_THERMAL_EXPANSION and LOAD_THERMAL_LOAD. I am not sure which method is the correct way but if the second method is the one then I am getting error in the process. Please see attached screen shot for the first method.</p><p>Thanks for your help</p>
<p data-start="69" data-end="143">Hello,<br data-start="75" data-end="78">I encountered the following warning and would like to resolve it:</p><div class="contain-inline-size rounded-2xl corner-superellipse/1.1 relative bg-token-sidebar-surface-primary"><div class="sticky top-[calc(var(--sticky-padding-top)+9*var(--spacing))]"><div class="absolute end-0 bottom-0 flex h-9 items-center pe-2"><div class="bg-token-bg-elevated-secondary text-token-text-secondary flex items-center gap-4 rounded-sm px-2 font-sans text-xs">*** Warning 50186 (MPP+186)<br> segment contains rigid body nodes<br> tracked node ID = 40242<br> tied interface # = 10<br> segment nodes:<br> 56438 56522 56523 56439</div></div></div><div class="overflow-y-auto p-4" dir="ltr"> </div></div><p data-start="341" data-end="442">In fact, I used the <em data-start="361" data-end="397">Tie-Node-Surface-Constraint_Offset card to tie a solid element to a rigid body.</p>
<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>
azuma.toshiharu.g9@s.mail.nagoya-u.ac.jp
February 6, 2026
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