We’re putting the final touches on our new badges platform. Badge issuance remains temporarily paused, but all completions are being recorded and will be fulfilled once the platform is live. Thank you for your patience.
General Mechanical

General Mechanical

Topics related to Mechanical Enterprise, Motion, Additive Print and more.

An internal solution magnitude limit was exceeded – Please help me.

    • tandinhtamky
      Subscriber

      Hi there,

      I have a problem.

      I cant find a solution for this. Please help me.

      Here is a file:

    • tandinhtamky
      Subscriber
      This simulation serves this:


    • peteroznewman
      Subscriber
      In your first post, you included a link to a .wbpj file. That file is useless without the _files folder of the same name.
      To move a Workbench project between computers, use the File Archive menu selection to create a .wbpz file which contains both of those items. You can attach that file directly to your post.
      In your second post, you show a textbook problem. Have you done the hand calculation to get the answers?
      What is the purpose in building an Ansys model of this textbook problem?
      If you want to build a model for that problem in Ansys, draw 3 lines of the correct length. Create three beam profiles and convert the lines to beams in SpaceClaim.
      In Mechanical, you can mesh them with 1 element each. Both ends should be fixed.
    • tandinhtamky
      Subscriber
      Hi Sir thanks for responding me.
      I have used the way you said, that is sketch 3 lines and add cross section for it in design modeler. I have got a mesh. but, in a add boudary condition, i can not select the face of model, so i can not add fixed, force or thermal. Help me please.
      Here is a updated link: https://drive.google.com/drive/folders/1TILtqzhx0jEh7G0nsJW7tWS6TkAcewE2?usp=sharing


    • tandinhtamky
      Subscriber
      But, even i add these boudary condition, it's still not working.

    • Erik Kostson
      Ansys Employee


      First since this is a truss make sure you use only one element per member (so you should have 3 elements in total - make the mesh size large enough, say 5000 mm or 5 m that you get only one per member). Otherwise it will not work if you are using truss elements (with beams it will work).

      For fixed support use it on the start and end vertices of your model not on the whole truss - so start vertex and end vertex of your model. That will then be as in your exercise where it is fixed at both ends.

      Finally and most importantly, make sure that you have connected parts in your cad via multi-body part in design modeler or sharing topology in space claim - if you do not do that they will not be connect and it will not solve.
      You can also still connect the members at their common vertex via merge nodes in mechanical (see help manual and search for merge nodes - if you do this you will get probably that it merged 2 nodes), that will share the nodes so they have common nodes there and are thus connected.

      Finally I recommend watching some videos online on how to model with beams and trusses.
      If you search (beam and truss and ansys workbench) you will get many hits on search engine.

      All the best

      Erik

    • tandinhtamky
      Subscriber
      Thank you so much, Erik
      i saw video you recommended, and it's necessary. i made it.
      But, 1 problem, when i set element size of mesh, for element 1 0.8m length, i cant set element size over 0.8m, maximum is 0.7999. Similarity for element 2 (0.6m length). But for element 3 (0.4m length), i can set element size over 0.4m, 0.5 or 0.6m are fine. I dont understand this.
      Here is a mesh with element size for element 1-2-3 (left to right): 0.7999m - 0.599m - 0.4m, respectively.
      And here is a stress contour with above element size:
      Maybe somthing wrong, i dont know ­ƒÑ▓


    • Erik Kostson
      Ansys Employee
      Hi
      First make sure that the line body definition and model type os ste to link truss


      Just set it under mesh defaults and mesh size as shown below - set it to 10 m and it meshes one element as expected - you do not need mesh sizing on the members just do it as shown below.

      Then make sure to have multi body part (see here) or use node merge as shown above otherwise the 3 members will not be connected:
      All the best

      Erik
    • John Carlos Espinoza García
      Subscriber
Viewing 8 reply threads
  • The topic ‘An internal solution magnitude limit was exceeded – Please help me.’ is closed to new replies.