PSI - Issue 42

Omar D. Mohammed et al. / Procedia Structural Integrity 42 (2022) 1607–1618 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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allowable damage is considered as Dalw = 1.0, and is equivalent to the number of cycles till failure Nf , which is the allowable number of cycles, represented by the red circle in Fig.9. The total damage Dtot is equivalent to the number of cycles n represented by the black circle. Moreover, the total damage can be calculated as stated by Eqs.1 and 2 (Fatemi & Vang 1998, Schoenborn et.al. 2015).

Fig.4 PPTE and stress results of Gear2-Ring engagement on the drive flank

Fig.5 PPTE and stress results of Gear1-Ring engagement on the coast flank

= 1 1 + 2 2 + 3 3 + 4 4 + 5 5 = ∑( ) = ≤

(1) (2)