convert stretech ratio to engineering strain, reasonable?

fruitkiwi

Hi, Dear all,

Currently try to modelling the unibixial tensile loading in some software.
We know that when you stretch something, it will generate stress. Then we will have stress-strain relationship.

I also read something about stretch ratio, which as defined in wikipedia
"The stretch ratio or extension ratio is a measure of the extensional or normal strain of a differential line element, which can be defined at either the undeformed configuration or the deformed configuration. It is defined as the ratio between the final length ℓ and the initial length L of the material line."
http://en.wikipedia.org/wiki/Deformation_(mechanics)

e(engineering strain)=λ(stretch ratio)-1.

Is it reasonable for me to convert the stretch ratio data set to engineering strain for application in abaqus or ansys in engineering real application?
i am worried it may have negative effect on my modelling when i do it, so need your advices.

Thank you.