A comparison of crack paths growth in brazilian disc with a central notch using various criteria for crack initiation

A comparison of crack paths growth in brazilian disc with a central notch using various criteria for crack initiation

Článek recenzovaný mimo WoS a Scopus

A numerical parametric study of the crack propagation under various level of mixed-mode condtions is evaluated. By focusing of the Linear Elastic Fracture Mechanics, the model with concrete input data of Brazilian Disc Test with a central notch is considered and its analysis with defined radius R, force P and material properties is performed. The results are obtained by varying the length an of the central notch and its angle of inclination α with respect to the horizontal axis. The crack growth direction is estimated through three different criteria: the maximum tangential stress criterion, the strain energy density criterion and the crack tip displacement criterion. This study involves the classical single-parameter fracture mechanics concept, in which the stress distribution in a cracked specimen is described by the stress intensity factors. The Williams solution of the crack-tip stress and displacement fields are taken into account. As a comparison, the solution is also provided with J-Integral. The model is created with the finite element method software ANSYS. Lastly, the suggested crack paths obtained by criteria are compared with experimental data.

A numerical parametric study of the crack propagation under various level of mixed-mode condtions is evaluated. By focusing of the Linear Elastic Fracture Mechanics, the model with concrete input data of Brazilian Disc Test with a central notch is considered and its analysis with defined radius R, force P and material properties is performed. The results are obtained by varying the length an of the central notch and its angle of inclination α with respect to the horizontal axis. The crack growth direction is estimated through three different criteria: the maximum tangential stress criterion, the strain energy density criterion and the crack tip displacement criterion. This study involves the classical single-parameter fracture mechanics concept, in which the stress distribution in a cracked specimen is described by the stress intensity factors. The Williams solution of the crack-tip stress and displacement fields are taken into account. As a comparison, the solution is also provided with J-Integral. The model is created with the finite element method software ANSYS. Lastly, the suggested crack paths obtained by criteria are compared with experimental data.

Crack propagation direction; Crack-tip field; Mixed-mode I/II; Single-parameter MTS/SED/CTD criteria; J-integral

Crack propagation direction; Crack-tip field; Mixed-mode I/II; Single-parameter MTS/SED/CTD criteria; J-integral

MIARKA, P.; FURGIERI, G.; RŮŽIČKA, V.; SEITL, S.; MERTA, I.

2020

31.12.2019

Ostrava, Česká republika

1213-1962

Sborník vědeckých prací Vysoké školy báňské – Technické univerzity Ostrava

19

2

Česká republika

33

38

6

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