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

Figure 2

Illustration of the loading-unloading-reloading path together with (a) the cyclic loading spectrum at (b) (first half cycle) and (c) (first half cycle): loading with opening of the cohesive surface (1  2); unloading (2  3); reloading with the damage accumulation (3  4); and subsequent partial unloading (4  5). The dot lines represent the degraded cohesive envelopes.

(a)

(b)

(c)