Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Simple FEM Process Process oriented and automated  Teaching purposes  Works with 3D geometry, only  Easy to use;“brain“ still needed

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Load exisiting HyperMesh model Load exisiting CAD model Create CAD model only works with 3D geometry !!! Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. L=1000 mm b=100 mm t=100 mm F=180 N Basic equations: Analytical solution Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.  Document working steps (panels)  List error sources Process:  CAD import  Geometry cleanup / repair  Prepare geometry according to mesh requirements  Meshing, mesh quality checks  Material  Loads, constraints (boundary conditions)  Export of FE solver deck  Analysis  Postprocessing  Loadstep(s) Exercise: Set-up of a static FEM analysis (kragbalken.hm) Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Exercise (file: clip_3dgeometry.hm)  Employ 3D tetra / hexa elements, size: 3, 2, 1 mm  Force Fy = N, -300 N  Constraints as depicted  Material: steel  List error sources  Document working steps and results Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Corresponding steps in HyperMesh (without Process Manager) Create Mesh (solid geometry is required) - 3D  Tetramesh 3D  Tetramesh Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Define Material Right mouse click in Model Browser  Create  Material  … -  Corresponding steps in HyperMesh (without Process Manager) Take care: A UserProfile (FEM Program) must be selected first (=OPTISTRUCT) CardImage (C.I.) MAT1: linear, isotropic, temperature independent Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Define Property Right mouse click in Model Browser  Create  Property  … Corresponding steps in HyperMesh (without Process Manager) CardImage (C.I.) PSHELL / PSOLID: 2D elements 3D elements Select previously defined material: Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Define Property In model browser, right mouse click,select property … CardImage (C.I.) PSHELL / PSOLID: alternatively … 2D elements 3D elements Corresponding steps in HyperMesh (without Process Manager) Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Assign Properties / CardImages Select elements and assign property alternatively … Corresponding steps in HyperMesh (without Process Manager) Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Create loadcollector … will be used to „store“ constraints (SPC) No CardImage needed Corresponding steps in HyperMesh (without Process Manager) Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Define Constraints (SPC) Analysis  constraints Dof1-3 translatation Dof4-6 rotation alternatively … Corresponding steps in HyperMesh (without Process Manager) Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Create loadcollector … will be used to „store“ forces (load) No CardImage needed Corresponding steps in HyperMesh (without Process Manager) Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Define forces Analysis  forces  Corresponding steps in HyperMesh (without Process Manager) alternatively … Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Define loadstep Analysis  loadsteps  SPC = single point constraint LOAD = forces/pressure Corresponding steps in HyperMesh (without Process Manager) alternatively … Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. the loadstep/subcase „combines“ Constraints SPC = Single Point Constraint and Forces Load = Force Simple FEM Process

Copyright © 2009 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Run analysis Analysis  OptiStruct  specify *.fem file (not existing yet) Contour panel Corresponding steps in HyperMesh (without Process Manager) Simple FEM Process