PSI - Issue 28

Victor Rizov et al. / Procedia Structural Integrity 28 (2020) 1237–1248 Author name / Structural Integrity Procedia 00 (2019) 000–000

1248 12

a significant increase of the strain energy release rate. The crack location in radial direction is characterized by 1 2 / R R ratio where 1 R and 2 R are the radiuses of the cross-sections of the internal crack arm and the bar, respectively. The influence of the crack location in radial direction on the longitudinal fracture behaviour of the cantilever is investigated depending on the loading conditions. It is found that when the loading is applied at the free end of the internal crack arm the strain energy release rate decreases with increasing of 1 2 / R R ratio. The opposite behaviour, i.e. the strain energy release rate increases with increasing of 1 2 / R R ratio, is observed when the loading is applied at the free end of the external crack arm. The present study contributes for a better understanding of the fracture physics of the inhomogeneous materials and is important for improvement and modernization of these materials with respect to their fracture performance. 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