PSI - Issue 36

Ivan Pidgurskyi et al. / Procedia Structural Integrity 36 (2022) 171–176 Ivan Pidgurskyi, Mykola Pidgurskyi, Petro Yasniy et al. / Structural Integrity Procedia 00 (2021) 000 – 000

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INPUT FACTORS

The ratio ,

The ratio а /4 с ,

that characterized the geometry of surface cracks

that characterized the coalescence zone of surface cracks поверхневих тріщин

Coalescence factor γ coal

OUTPUT FACTORS

Fig. 1. Coalescence process model and block diagram of simulation modeling of coalescence of two identical coplanar surface cracks.

Fig. 2. Distribution of SIF values K I along the contour of the saddle-shaped surface crack with the ratio a/ 4 c = 0,175 during modeling of a gradual coalescence a coal / a : 1) 0.149; 2) 0.256; 3) 0.378; 4) 0.491; 5) 0.626; 6) 0.754; 7) 0.85; 8) 0.95 at σ = 187.5 MPa for the relative length of the crack front. Peculiarities of the SIF distribution along the saddle-shaped contour of the surface crack during coalescence are usually characterized by the coalescence factor γ coal . The coalescence factor γ coal , which characterize the ratio of SIF