Application of a Cohesive Zone Model for Simulating Fatigue Crack Growth from Moderate to High Levels of Inconel 718

Figure 3

(a) Sketch of a CT specimen (initial crack length  mm, width  mm, and thickness  mm) and (b) the FE mesh (a half of the specimen is modeled), and (c) points 1, 2, 3, and 4 correspond to the four integration points located along the crack growth path (the distance between two adjacent points is 1.2 mm), and the arrow indicates the initial crack-tip of the CT specimen.