PSI - Issue 38

Adrian Loghin et al. / Procedia Structural Integrity 38 (2022) 331–341 A. Loghin et al. / Structural Integrity Procedia 00 (2021) 000–000

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Fig. 3: (a) Close-up view at crack location site; (b) Crack surface mesh of the last simulated increment; (c) Geometric representation of the simulated crack surface; (d) Data collection for crack length measurement and associated cycles.

Fig. 4: (a) Mode I stress intensity factor ( K I ) at maximum applied load from each crack increment; (b) ( a X , a Y ) planar position of sequential crack front increments, ” a ” instantaneous crack length; (c) Stress concentration factors at the hole, two locations: left and right side; (d) Nominal crack length vs. cycles assessment.

intensity factor values K Imax and K IImax across the crack front, crack length a , crack tip X and Y coordinates at the model boundary [ a X , a Y ] at every crack growth increment. Since the magnitude of K IImax is minimized during the