To modelate material

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  • Last Post 01 August 2018
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mekafime posted this 01 August 2018

Hello,

I try to get this plot, material is stainless steel Duplex, 

 

I have this table :

in Ansys, Engineering Data, in Bilinear Isotropic, the rows only has: "Temperature", "Yield Strength" and "Tangent Modulus". 

Please, can I help me?

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SandeepMedikonda posted this 01 August 2018

Hi,

  ANSYS doesn't have this Ramberg-Osgood curve, so you might have to use the multilinear isotropic hardening model. Just digitize the curve and use the stress-strain data to start with?

  Use the tool that Peter recommends here.

Regards,

Sandeep

 

 

mekafime posted this 01 August 2018

 Hi, thanks for your answer, for Temperature, I don't have information ...

rgpatchi posted this 01 August 2018

Hi mekafime,

The reason for the ? is that Multilinear Isotropic hardening needs stress vs plastic strain data (instead of stress vs total strain, as you can also see from the header of the column) and the first row value for plastic strain should be zero. Since there is a non-zero value for this input, it is not allowed and is indicated by yellow color in this cell. 

If you have stress vs. total strain data, you would need to convert this into stress vs plastic strain data (in Excel) before you input it into Engineering data. 

In Excel, simply add another column for elastic strain calculations, which would be your current stress divided by elastic modulus. 

Then, subtract your column of elastic strain from total strain to get plastic strain, which would be used for input into Engineering Data. 

You can leave Temperature field blank.

Hope this helps. 

Best regards,

-Rohith

 

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