Yield Criterion & Cyclic Hardening in Forming

Junta_20361
Junta_20361 New Altair Community Member
edited October 2020 in Community Q&A

Dear Expert,

I'm using InspireForm and HyperForm simulate my 'sheet metal forming process'.

I have some questions related to the material parameters in Radioss solver.

Currently, i'm using a material for stamping but i don't have its full specifications.

I have the stress-strain curve already. (taken from the tensile test).

However, in InspireForm, it requires us to define the yield criterion and cyclic hardening.
<?xml version="1.0" encoding="UTF-8"?>image.png.4ddf3103b3eb3a0114d03ba833d5cbcf.png

So my questions are:

1. Is it necessary to input the yield criterion and cyclic hardening?

2. How can i calculate those specs?
3. If i don't have those specs, what should i choose?

(i only have the tensile test data for 'force vs displacement'.

Thank in advance!

Tagged:

Answers

  • Adriano_Koga
    Adriano_Koga
    Altair Employee
    edited August 2020

    Convert your data to true stress x strain curve and there's an option of entering the curve (instead of using the power law).

  • Junta_20361
    Junta_20361 New Altair Community Member
    edited August 2020
    Altair Forum User said:

    Convert your data to true stress x strain curve and there's an option of entering the curve (instead of using the power law).

    hi Koga,
    Thanks for your answer.
    Maybe my question wasn't clear.
    I have already had the true stress-strain curve and i can input into InspireForm.

    The question is how can i define the Yield Criterion (von-mises, hill, balart?) and the Cylic Hardening (isotrophic, kinematic or Yoshida)?

Categories