Issue 72

X. Cao et alii, Frattura ed Integrità Strutturale, 72 (2025) 162-178; DOI: 10.3221/IGF-ESIS.72.12

f N 1 and f N 2 are the fatigue life at the first and second stress levels, respectively, n 1 is the number of cycles

respectively,

p n 2 is the number of cycles under σ 2 , namely, the residual fatigue life.

under σ 1 , and

Figure 2: The whole experimental framework for fatigue life prediction of welded structures under two-step loading based on physics informed CTGAN. Step2: The CTGAN model was used to data augmentation based on the original welded structure fatigue dataset that has been built. The fatigue attributes σ 1 , σ 2 , n 1 , f N 1 , f N 2 , p n 2 are input into the CTGAN model. The trained model finally obtains fatigue data with outputs σ m 1 , σ m 2 , m n 1 , m n 2 . Where σ m 1 and σ m 2 are the generated first and second stress levels, respectively, m n 1 is the generated number of cycles under σ m 1 , and m n 2 is the generated number of cycles under σ m 2 . Filtering in fatigue data from σ 1 , σ 2 , m n 1 , f N 1 , f N 2 , m n 2 and the data were normalized.

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