Hi,
I am trying to extract logrithmic strains from Abaqus and then trying to compare with the experimental ones but I am getting different results. I found out the in Abaqus it uses slightly different formula then what I use theoretically.
In abaqus it computes LE from the following formula:
LE = plastic strain - true stress/E
But what I believe is that it should be like:
LE = plastic strain - yield stress/E
Can any one highlight why abaqus is using the first formula for LE calculation?