General Mechanical

General Mechanical

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Creep Strain Validation

    • Chandra Sekhar Narra
      Subscriber

      Hello Group members,

      I had performed creep analysis, for the Norton's creep law. I got the result without any errors.

      I have a question, is there any method to validate this equivalent creep strain?

      How to validate the creep from Ansys?

      Kind regards

      Chandra

    • John Doyle
      Ansys Employee

      Usually the creep coefficients are derived (via curve fitting) from emperical data.  Do you have any emperical data that you can try to echo back in an FEA simulation?  Or perhaps there is a whitepaper or other publication that did this work already that you could try to replicate.

    • Chandra Sekhar Narra
      Subscriber

      Thank you for your answer. I am trying  to replicate one publication by using the coefficients they mentioned in the paper.

    • John Doyle
      Ansys Employee

      Ok great.  It should work, but you have to make sure it is an apples-to-applies comparison in all the details (element technology, mesh, solver specifications, loads and BCs.,...etc).

      • Chandra Sekhar Narra
        Subscriber

        Yeah, it is working. I can see that the results in the paper and my simulation results look almost similar.

         

    • John Doyle
      Ansys Employee

      Also, if the paper is referring to an ABAQUS simulation, take care to make sure that the creep coefficients corrolate to same exact expression.  In other words 'C1', in Ansys, does not always corrolate to 'C1', in ABAQUS.  Check the mathematical expressions carefully.

      • Chandra Sekhar Narra
        Subscriber

        Actually, the paper refers to ANSYS  only, they mentioned it clearly. Also, they mentioned the Norton Creep equation too.

        The expression is correct as  I compare it in ANSYS documentation.

         

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