yade-users team mailing list archive

Thread
Date

Re: [Question #172107]: Difference between volumetric strains evaluated by strains and void ratio

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Chareyre <question172107@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 26 Sep 2011 12:10:55 -0000
Reply-to: question172107@xxxxxxxxxxxxxxxxxxxxx
Sender: bounces@xxxxxxxxxxxxx

Question #172107 on Yade changed:
https://answers.launchpad.net/yade/+question/172107

    Status: Open => Answered

Chareyre proposed the following answer:
Consider that strain (be it a ekk component or epsv) can be defined exactly from its derivative: de/dt=dL/(L.dt) (resp. dV(V.dt).
Then by integrating  between t0 and t, you get a logarithm. Hence epsv = log(V/V_0)

Consider diving into this:
http://en.wikipedia.org/wiki/Deformation_%28mechanics%29

Quoting:
"The logarithmic strain provides the correct measure of the final strain when deformation takes place in a series of increments, taking into account the influence of the strain path"

-- 
You received this question notification because you are a member of
yade-users, which is an answer contact for Yade.