PSI - Issue 59

Eugene Kondryakov et al. / Procedia Structural Integrity 59 (2024) 50–57 Eugene Kondryakov et al. / Structural Integrity Procedia 00 (2023) 000 – 000

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Fig. 8. Crack propagation kinetics in 0.5T C(T) (a), 0.16T C(T) (b) and side grooved 0.5T C(T) (c) specimens.

Fig. 9. Crack propagation velocity distribution over normalized crack length in all specimen types.

4. Conclusions An experimental investigation of the fracture of three types of specimens was carried out: CT-0.5T, miniature CT-0.16T and side-grooved CT-0.5T compact specimens from steel 15Kh2NMFA cut in three mutually perpendicular directions. Features of crack evaluation were studied depending on the type of specimen and the direction of its cutting. Numerical simulations of CT-0.5T, CT-0.16T and side-grooved CT- 0.5T compact specimen’s tests were carried out using the extended finite element method. The fracture criterion parameters for steel 15Kh2NMFA were determined and the influence of constraint in the crack tip for different specimens on the peculiarities of crack