The article A Probabilistic Model of Fracture in Concrete and Size Effects on Fracture Toughness (Magazine of

Question:

The article "A Probabilistic Model of Fracture in Concrete and Size Effects on Fracture Toughness" (Magazine of Concrete Res., 1996: 311-320) gives arguments for why fracture toughness in concrete specimens should have a Wei bull and presents several histograms of data that appear well fit by superimposed Wei bull curves. Consider the following sample of size n 5 18 observations on toughness for high strength concrete (consistent with one of the histograms); values of pi = (i - .5)/18 are also given.

Construct a Weibull probability plot and comment.

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