Principal plastic strain (dpf.operators.result.plastic_strain_principal_1) not matching with EPPL1

dutta
dutta Member Posts: 2 **
in Structures

Hi, i am trying to get principal plastic strain with ansys.dpf.core for all loadsteps and calculate the principal plastic strain range with the following code

I am not able to get the same value with a user defined result object (EPPL1) in ansys mechanical.

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  • Mike.Thompson
    Mike.Thompson Member, Employee Posts: 361
    25 Answers 100 Comments Second Anniversary 25 Likes
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    To debug these kinds of issues do the following to isolate variables:
    1. Review a single time point
    2. Review a single Node (do a named selection of a single node in mechanical)
    3. Review the values of the entire tensor (X,Y,Z,XY,XZ,YZ)

    Check if you can match the values of the tensor for a particular node at particular time point. If not, then please repost and show method for comparison.

    If you can match the values, start to expand the comparison:
    1. Obtain the principal values (invariants) from the tensor
    2. Expand this to other nodes or set of nodes
    3. Expand this to other time points

    Some other things to check is if you are averaging the same in both methods. For example averaging across bodies or materials etc...

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