Question #670047 on Yade changed: https://answers.launchpad.net/yade/+question/670047
Aníbal Sánchez Numa posted a new comment: Hello again, Jan: I modified the script to save the plot data into a file. I thought I should calculate the first derivative of the curve which seems to be in corresponding to the concept of Young modulus but the data don't allow me that since the first points extracted have 0 stress... I show here the first part of the file. -2.48824398585e-17;0.0 -1.78952486733e-06;0.0 -3.57904973463e-06;0.0 -5.36857460193e-06;0.0 -7.15809946924e-06;0.0 -8.94762433654e-06;-186659.792761 -1.07371492038e-05;-186659.792761 -1.25266740711e-05;-186659.792761 -1.43161989384e-05;-186659.792761 -1.61057238057e-05;-186659.792761 -1.78952486731e-05;-398472.332577 -1.96847735404e-05;-398472.332577 -2.14742984077e-05;-398472.332577 -2.3263823275e-05;-398472.332577 -2.50533481423e-05;-398472.332577 -2.68428730096e-05;-586864.566007 -2.86323978769e-05;-586864.566007 -3.04219227442e-05;-586864.566007 -3.22114476115e-05;-586864.566007 -3.40009724788e-05;-586864.566007 -3.57904973461e-05;-784964.591216 -3.75800222134e-05;-784964.591216 -3.93695470807e-05;-784964.591216 -4.1159071948e-05;-784964.591216 Actually, the strain turns out to be negative (could this be correct?) although I thought may be it has to be with the sense of the axe.. Anyway, I was told to use the first derivative of a point formulas for a set of points but which points should I use if I use the first two then I get a 0 stress, I could use some in the middle but which ones are the correct??? You told me to calculate the "initial slope" but what does it mean exactly in this case??? Thanks in advance -- You received this question notification because your team yade-users is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
