PSI - Issue 41

Venanzio Giannella et al. / Procedia Structural Integrity 41 (2022) 298–304 V. Giannella / Structural Integrity Procedia 00 (2022) 000–000

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turn, this underlined the importance of this dimension in terms of fatigue life of the component, i.e. the crack nucleation life. One of the purposes of the analyses presented in this work was to evaluate whether this size played a significant role also in terms of crack propagation life.

Figure 1. Problem description for the life assessment of an aircraft compressor: blade-disk fillet radius variability, rotational speed variability due to primary centrifugal loads, material scattering.

Figure 2. FEM models built up considering a fillet radius variability; most stressed position subsequently considered as crack initiation point; variation of maximum principal stresses with fillet radius size.