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Life estimation model of a cantilevered beam subjected to complex random vibration
Author(s) -
PAULUS M.,
DASGUPTA A.,
HABTOUR ED
Publication year - 2012
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/j.1460-2695.2012.01693.x
Subject(s) - cantilever , vibration fatigue , structural engineering , finite element method , random vibration , vibration , spectral density , fracture mechanics , beam (structure) , frequency domain , materials science , gaussian , mechanics , engineering , acoustics , mathematics , mathematical analysis , physics , quantum mechanics , telecommunications
An analytic methodology was developed to predict the fatigue life of a structure experiencing stationary, Gaussian random vibration excitation. This method allows the estimation of fatigue life using a frequency domain method, where only the input power spectral density and damping factor are required. The methodology uses linear elastic fracture mechanics for fatigue crack propagation and accounts for the frequency shifting that occurs due to fatigue crack evolution. Good results have been obtained comparing the analytic model to both finite element analysis (FEA) and experimental results, for mild‐steel cantilever beams.