The Stress Analysis of Cracks Handbook, Third Edition
6 Strip Yield Model Solutions
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The following pages are devoted to strip yield model solutions (sometimes called the “Dugdale-Barrenblatt model”; e.g., Barrenblatt 1962). This model is useful in assessing the effects of finite configuration size and high net section stresses on the plastic zone size accompanying a crack tip. It does give plastic zone size estimates with some improvement over the small-scale yielding analysis represented by Eq. (27) (p. 1.11), but falls short of a full plasticity solution. Consequently, the formulas on these solution pages should be regarded as improved estimates of plastic zone size, l , as directly comparable to rp of Eq. (29) (p. 1.11).