PSI - Issue 22

Carlos D.S. Souto et al. / Procedia Structural Integrity 22 (2019) 376–385

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Author name / Structural Integrity Procedia 00 (2018) 000–000

(a) User input data tab.

(b) Rainflow counting algorithm tab.

(c) Fatigue damage calculation tab.

Fig. 4: FDT’s user interface.

Input various parameters ( Δσ C , Δτ C , m 1 , m 2 , γ Mf , γ Ff , n Reps )

Obtain the stress-time history (real data)

FDT > Tools > Convert to Peaks and Valleys

Input the stress-time history (peaks and valleys only)

Execute the rainflow-counting algorithm (ASTM E1049-85)

Calculate the fatigue damage, D (Palmgren-Miner rule)

Input the design fatigue factor, D FF , and check if D ≤ μ = 1/D FF

Generate a PDF report (FDT > File > Report)

Fig. 5: Basic usage of FDT.