Figure 17. G Imax vs. d a /dN diagram for the 12.70-mm-thick DCB specimens under constant ampli- Figure 17. G Imax vs. d a /dN diagram for the 12.70-mm-thick DCB specimens under constant ampli- Figure 17. G Imax vs. da/dN diagram for the 12.70-mm-thick DCB specimens under constant ampli- tude fatigue. tude fatigue. tude