Papers Published

1. Ojdrovic, R.P. and Petroski, H.J., Process zone analysis for the single-edge notched specimen. II. Process zone growth and crack propagation, Int. J. Fract. (Netherlands), vol. 49 no. 1 (1991), pp. 17 - 28 .
   (last updated on 2007/04/09)

   Abstract:
   For pt.I see ibid., vol.49, p.1-16 (1991). Process zone growth and crack propagation in the single-edge notched (SEN) specimen are studied using the relations among applied load, notional crack and process zone lengths, and crack opening displacement. Process zone growth is simulated by increasing the notional crack length while keeping the traction-free crack length constant. A model for crack propagation based on either critical crack tip opening displacement (CTOD) or critical process zone length, as criteria for traction-free crack extension is proposed. The influence of closing pressure distribution, initial traction-free crack length, and crack extension criterion on the behavior of load vs. CMOD curves is discussed. The present model can be used to model load-deformation behavior from initial loading through softening to failure of nonlinear materials, as is verified by comparing the theoretical and experimentally determined load vs. crack mouth opening (CMOD) curves for concrete beams

   Keywords:
   crack-edge stress field analysis;