Quote Originally Posted by RalphLambrecht View Post
Tat's rather complicated.that's ehy I use a simple average gradient as phil davies shows in his book''Beyond the ZO
ZONESystem'.Tha's all you needin my opinion.
I would not disagree with you, Ralph—after all, it was your great book that got me onto the path of material testing, many thanks for your very useful Excel spreadsheets.

However, I have found that I wanted to understand the various ways of parametrising the curves, and their gradients, as I was getting into it all. I suppose it is personal. Also, at this stage, I am finding that, for my work, CI matches my needs a little better than other gradients. Since there were no easily available tools for computing it, I just wrote one yesterday, so it is quite easy—for me at least—to have a CI at a push of a button.