A suggestion for systematic load interaction studies on fatigue crack growth

The plastic zone size ~i has to be calculated corresponding to monotonic loading (contrary to [6]). As to crack lengths a > a , plastic zone, stresses, and displacements at maximum load °max correspond to the monotonic loading state (Fig. 3). Stresses and displacements at minimum load amin, however, are still affected by overload beyond a = a (Fig. 3b), i.e., the load interaction zone is greater than supposed by [7,8].