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Is it possible to extract layered solid composite stress (on PCOMPLS) in frequency response
Hello, I'm trying to extract stress on a composite that is modelled using PCOMPLS. I used the same laminate in linear static, where I extracted layered solid composite stress, I ued same composite panel(or methodology) to build remaining structure using HEXA elements for modal, sine and random analysis. But in frequency…
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How can the views of the different element quality criteria be displayed in TCL?
Hello, I would like to develop a TCL script to automatically generate screenshots of the different 2D and 3D element quality criteria. Currently, I am able to display the following view for 2D elements : I would like to be able to isolate the different criteria as shown below, but I cannot figure out how to do it. For 3D…
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Need a help with Grav load case in Optistruct
Hello Team , good afternoon! I am trying to apply 5G gravity load case on fuel tank cross member with inertia relief . But looking into animation I am not observing any mode or movement with fuel tank cross member . Want to weather all the boundary conditions are met and applying correctly here, can you please help?
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High displacements in 1D elements frame, Hypermesh
I have made a frame consisting of 1D elements, ref. horizontal frame 01.png. The frame is appr. 10 m x 7 m, and the beams are made from GRP. The frame is suspended from six lines, assumed to have no mass, and is only subjected to gravity. I have made a non-linear static analysis, and my impression is that the displacements…
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Student Edition License problem
Hello Altair Team support, My Altair One account only shows the Workspace interface (Marketplace, Drive, HPC).I cannot access the Software Portal (Products → HyperWorks → Get License). As a result, I cannot activate the HyperWorks Student Edition license and OptiStructFEA_Student does not appear in Managed Licensing. Could…
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How to use your Student Edition License
Please, is there someone who can help me with a license issue? This is my first time installing HyperWorks products. I followed the recommended steps: I downloaded hwDesktop2025.1_win64.exe and installed it, then activated the license using the activation key generated on my Altair One account. I downloaded…
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Subcase convergence till 0.99 of load in SimLab (OptiStruct)
Hello, i'm pretty new in OptiStruct solver and can anyone help me with my case please? The loadcase is converging only till 0.999998 of load. Is there any way how it could continue (load scale or something similar) from LoadCase 1 (Pretension) which stopped on 0.99999 (depends on DTMIN) of load to LoadCase2. Or if you can…
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nanoFluidX to structural analysis (Optristruct).
Hi. Does anyone know how to transfer the results of a "Tank Sloshing" calculation from nanoFluidX (pre- and postprocess within Simlab) to boundary conditions in a structural analysis, e.g., linear static or Explicit Dynamic (Optistruct, Radioss)? This is a necessary connection to obtain the correct pressure distribution in…
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Sine on Random optistruct
Hello everyone, I need to perform Sine on Random analysis for that i need a random subcase and a sine subcase, I performed a MFRA for Random vibrations and called that for Random analysis using RANDPS. I used 1 FATLOAD to call random subcase( analysis type = RANDOM, Random: RANDPS), another FATLOAD to call sine subcase(…
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Generation of a laser weld (L-Type)
I have two components that are pressed against one another and are attached using a laser weld (l-type). The mesh should not be changed, and one is meshed as a 3d solid section and the other is a 2d shell section (type:planar section). I cannot realize the weld or give the depth and width of the seam weld when using the…
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Clarification on MPC Force vs Applied Force in Nonlinear Transient Analysis with RBE2 and Frictional
Description: I am performing a Nonlinear Transient Analysis in OptiStruct and would like clarification on the interpretation of MPC forces and force equilibrium. Model Setup Load applied through an RBE2 spider. Force magnitude: 250 N. Force applied at the independent node of the RBE2. Loading direction: Normal to the…
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is it possible to set up Mfluid in Simlab like in Hypermesh?
Hi! I am doing a basic normal analysis for a tank and I am trying to add full water inside, I have tried already to add a mass on the gravity point to simulate the tank with water inside but the result does not change much( I have asked to a teacher during training and he said I have to add a structral mass but I do not…
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Von Mises Stress for PBEAM
Hello everyone, I have a question regarding the stress output of PBEAM elements. When using PBEAML, I can obtain normal stresses, shear stresses, and von Mises stresses at the stress recovery points without any issues. However, when I define a PBEAM with a custom beam section using Engine: FEM and specify stress recovery…
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nCode DesignLife Spot Weld AnalysisにおけるCWELD径とNugget径の扱いについて
Altairパートナー製品である nCode DesignLife の Spot Weld Analysis を使用しています。 HyperMeshでスポット溶接をCWELDでモデル化する際に設定するスポット径と、DesignLifeのSpot Weld設定で入力する Nugget Diameter の違いについて教えてください。 特に以下の点を知りたいと考えています。 CWELD径は疲労寿命計算にどのように寄与するのでしょうか。 Nugget Diameterは疲労寿命計算にどのように寄与するのでしょうか。 それぞれは寿命計算のどの段階（荷重抽出、応力換算、構造応力計算など）で使用されるのでしょうか。…
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Unable to Get H3D while the Model is running
Hi, I'm running a non-linear model in optistruct with the below options, but not getting H3D file to review the results while it's running like it can be done for Abaqus solver. OUTPUT,H3D,ALL DISPLACEMENT(H3D) = ALL STRESS(H3D) = YES NLOUT with TIME option for OUTPUT SET 34 TIME 0.0 0.005 0.05 0.1 0.2 0.3 0.4 0.5 0.6 0.7…
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Motionsolve Case 7022: Several Questions
I am using the 2026 version of Motionview and now I want to do bidirectional coupling between MS and Optistruct. I saw that the 7022 case is about this, but when reproducing the 7022 case, I checked the flex body and did not see the functional source and Input Optistruct in the tutorial. Do I need to set anything for this?…
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There is a bug when I do a free size optimization on a composite laminate
Description: When a set up the optimization, I select homogenized weave in the "Product" options for some plies and I also have some core but when I open the result .fem they all switched back to unidirectional. I was wondering if this affected my results ? Also, I read that if you select core for a ply it is not suppose…
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PRELOAD/AXIAL TRUSS ELEMENTS RADIOSS
Hello everyone, I am working on a Radioss explicit simulation in HyperMesh 2026 and I need to apply an axial preload tension to a set of truss elements (string modeled with /PROP/TYPE2) to simulate the pretension of a tennis racket stringing. According to the Radioss 2026 Reference Guide, this should be done using the…
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Optistruct CTYPE=ANAND
Hello, I'm trying to run a nonlinear thermal analysis for a solder joint with the Anand creep material model (CTYPE=ANAND). However, under MAT1, MATVP I only see the CTYPE options TIMEC, TIMET, and STRAIN. Using Optistruct V.2026 I'd greatly appreciate any help!
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Mindlin SHELL transverse shear problem
Hi everyone 👋, I have been working on a model lately, and I think I have encountered a problem concerning the Mindlin shell formulation of CQUAD4 elements: I noticed that on every SHELL elements of my model, the transverse shear value are null, both of them, like if I was doing a thin-shell formulation (cf picture 1&2…
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Sine on Random Vibrations
Hello everyone, I have a structure which requires Operational sine on Random vibrations. What should i do, Should I perform Random vibrations and Sine sweep analysis in different subcases and combine them in damage calculation,…
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Help with geometry simplification Hypermesh Optistruct
Good morning everyone, I am currently working on the pre-processing of a tennis racket geometry. As you can see from the image attached, I would like to simplify the area around the hole by removing the fillets, as they are preventing a proper mesh generation and making the geometry too complex. I have been using the…
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how to edit or delete community post
Hi, i would like to edit my previus post on the comunity, however I don't have the option to do so from the three dot menu. I can only mute the post and the option to edit or report aren't shown unlike what i have read on guides from a few months ago. Is it no longer allowed? Any kind of help is appreciated. Thank you in…
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Overhang Constraint for Topology Optimisations in HyperMesh
Hello, I wanted to ask how the overhang constraint is defined (within the Topology optimisation design variable card) within Altair HyperMesh when running a topology optimisation. I am designing a part for metal 3D printing and the printer cannot print within 30 degrees of the build plate, as shown in number 3. However the…
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Is there a way to couple all material properties to density in multi-material topology optimization?
Description: Hello, I am a student doing a master's thesis on multi-material and multi-objective topology optimization. I have successfully done both separately using Altair Hypermesh and OptiStruct, but now I was trying to achieve multi-material multi-objective topology optimization. I am trying a thermo-mechanical…