Equivalent Plastic Strain In ANSYS Mechanical

Here, we explain what is the equivalent plastic strain on an engineering body and how to calculate the equivalent plastic strain in ANSYS® Mechanical structural analyses. 

What Is Equivalent Plastic Strain?

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If you look at the stress-strain curve of material, there is a point called as ‘yield point’. After the stresses beyond this yield point, the material undergoes non-elastic deformation. There is a permanent deformation after this yield point. Their permanent deformation is called plastic deformation in materials science. 

The equivalent plastic strain is the total strain energy of this plastic deformation value on a material. 


How To See The Equivalent Plastic Strain In ANSYS® Mechanical?

It is very simple. First of all, you need to be defined the required boundary conditions for your FEA analysis in ANSYS® and you need to be created the mesh structure.

Click on the ‘Equivalent Plastic’.

To see the equivalent plastic strain results in ANSYS®, right-click on the ‘Solution’ tab then hover your mouse on the ‘Insert’. Then select the ‘Equivalent Plastic’ option from the ‘Strain’ tab as shown above.

Click on the ‘Solve’ button to see the equivalent plastic strain result of your FEA structural analysis in ANSYS®.

Equivalent plastic deformation result.

According to the result above, there is no plastic deformation on the part. If it was a plastic deformation, the equivalent plastic strain will be shown as contours.


Looking at the equivalent plastic strain results in ANSYS® is very simple as you see above. 

Do not forget to leave your comments and questions below about the equivalent plastic strain results in ANSYS® Mechanical.

NOTE: All the screenshots and images are used for educational and informative purposes. Images used courtesy of ANSYS, Inc.


4 responses to “Equivalent Plastic Strain In ANSYS Mechanical”

  1. Mark Maged Avatar

    The result shows zero strain, not because there is no strain in the problem, but because the material defined in this simulation is not allowed to deform plastically.
    In order to include plastic deformation in the simulation, plasticity must be added to the material. and preferably, (General non-linear material should be used as well).

    1. MB-Editor Avatar

      Is it about an error that you encountered while doing your analysis?

  2. Anna Ansys Avatar

    What is the von mises plastic strain then?

    1. MB-Editor Avatar

      You can have information about Von-Mises theory here; https://mechanicalland.com/von-mises-stress-calculator-for-ductile-materials/

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