General Mechanical

General Mechanical

How to find Norton-Bailey Creep Constants?

    • Joshua Davies

      Hello All, 

      I am trying to mimic my experimental results with a model in ANSYS, and incorporate creep. 

      The experiment is simply measuring deflection of this old timber over the course of a few weeks in order to try to find a few material properties. 

      However, how do I find the constants purely from the data below?

      Any help would be massively appreciated. 

      Thank you in Advance!

    • John Doyle
      Ansys Employee

      I assume by "Norton-Bailey"  you mean an expression of the following form:  

      In Ansys, you can curve fit the Time Hardening Creep expression, with C4 set to zero. 

      You would have to convert your displacment values to an equivalent strain (=delta_L/L).

      Please refer to Chapters 4 and 6 of the MAPDL Material Reference Manual or more details.

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