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Convert stretech ratio to engineering strain, reasonable?

  1. May 17, 2012 #1
    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 [Broken])

    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.
    Last edited by a moderator: May 6, 2017
  2. jcsd
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