March 31, 2020 at 4:58 pm
Wenlong
Ansys Employee

Hi,


For materials like metal, yield strain is usually defined as 0.2% shifting, and it is possible that the stress-strain curve is not linear before the yield strain and Yield stress/E not equal yield strain. Your E should be the initial modulus. 


Please refer to https://en.wikipedia.org/wiki/Yield_(engineering) for more details. 


Regards,


Wenlong