On A Mixed-Mode Dugdale Model
Title - Alternative
A model attributed to Dugdale provides a correction for plasticity effects at crack tips in Mode I, under the assumption of small-scale yielding. Similar models have been proposed for Modes II and III, the former fairly recently. In the present study, the Dugdale model is extended to cases combining Modes I, II and III, based on the von Mises yield criterion. The combined model provides an a posteriori estimate for plasticity effects, based only on the stress intensity factors from the elasticity solution. It also provides an estimate for the crack-opening displacement and the J-integral value. In the limit of small loads, the corresponding elastic results are recovered.
Nicholson, D. W., "On A Mixed-Mode Dugdale Model" (1993). Faculty Bibliography. 1756.