Torsional and axial fatigue tests were performed on steel 42CrMo4+QT and aluminium alloy 7075-T6, and a 3D optical profilometer was used for the investigations of the fracture surfaces. The mode I and mode III critical distances of the two materials were regarded as reference scales for evaluating the initial orientation of the cracks and then identifying the tests valid for the calibration of the normal and those for the shear-fatigue models. The torsional strength of blunt notched specimens was then predicted with the Smith-Watson-Topper and the Fatemi-Socie criteria, combined with the critical distances and the Chaboche model for the steel.

Torsional-loaded notched specimen fatigue strength prediction based on mode I and mode III critical distances and fracture surface investigations with a 3D optical profilometer / Santus, C.; Romanelli, L.; Grossi, T.; Neri, P.; Romoli, L.; Lutey, A. H. A.; Pedranz, M.; Benedetti, M.. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - STAMPA. - 161:(2022), pp. 106913.1-106913.14. [10.1016/j.ijfatigue.2022.106913]

Torsional-loaded notched specimen fatigue strength prediction based on mode I and mode III critical distances and fracture surface investigations with a 3D optical profilometer

Pedranz M.;Benedetti M.
2022-01-01

Abstract

Torsional and axial fatigue tests were performed on steel 42CrMo4+QT and aluminium alloy 7075-T6, and a 3D optical profilometer was used for the investigations of the fracture surfaces. The mode I and mode III critical distances of the two materials were regarded as reference scales for evaluating the initial orientation of the cracks and then identifying the tests valid for the calibration of the normal and those for the shear-fatigue models. The torsional strength of blunt notched specimens was then predicted with the Smith-Watson-Topper and the Fatemi-Socie criteria, combined with the critical distances and the Chaboche model for the steel.
2022
Santus, C.; Romanelli, L.; Grossi, T.; Neri, P.; Romoli, L.; Lutey, A. H. A.; Pedranz, M.; Benedetti, M.
Torsional-loaded notched specimen fatigue strength prediction based on mode I and mode III critical distances and fracture surface investigations with a 3D optical profilometer / Santus, C.; Romanelli, L.; Grossi, T.; Neri, P.; Romoli, L.; Lutey, A. H. A.; Pedranz, M.; Benedetti, M.. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - STAMPA. - 161:(2022), pp. 106913.1-106913.14. [10.1016/j.ijfatigue.2022.106913]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/339971
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