Stress and Strain Conversion

[clsang]

Hi, all.

The stress and strain reported from my code will be in Cauchy stress and Logarithmic strain as I invoke the Updated Lagrange option in my code.

I know there is a general formula for converting 2nd Piola Kirchhoff stress and Green Lagrange strain to engineering stress and strain.

However, what about the formula for converting Cauchy stress and Logarithmic strain to engineering form ? Can anyone kindly advise on this.

Thank you in advance.

clsang