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Methodology for assessing embryonic cracks development in structures under high‐cycle multiaxial random vibrations
Author(s) -
Vantadori S.,
Haynes R.,
Fortese G.,
Habtour E.,
Ronchei C.,
Scorza D.,
Zanichelli A.
Publication year - 2018
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12634
Subject(s) - structural engineering , vibration , materials science , cantilever , vibration fatigue , frequency domain , random vibration , computation , nonlinear system , plane (geometry) , low cycle fatigue , harmonic , spectral density , fatigue testing , engineering , mathematics , physics , acoustics , mathematical analysis , geometry , algorithm , quantum mechanics , telecommunications
Abstract The myriad applicability of the frequency‐domain critical plane criterion is outlined in order to evaluate and track the progression of fatigue damage in metallic structures subjected to high‐cycle multiaxial random vibrations. The fatigue assessment using the given criterion is performed according to the following stages: (i) critical plane definition, (ii) power spectral density evaluation of an equivalent normal stress and (iii) computation of the damage precursor and fatigue life. The frequency‐domain critical plane criterion is validated using experimental results related to (a) AISI 1095 steel cantilever beams under nonlinear base vibration, (b) 18G2A steel and (c) 10HNAP steel round specimens under random non‐proportional combined flexural and torsional loads.