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Acoustic fatigue life prediction for nonlinear structures with multiple resonant modesAn efficient method is presented for estimating the high-cycle fatigue lives of complex nonlinear structures. The procedure is based on an application of the method of equivalent linearization to construct a time-domain representation of the stress or strain response of a nonlinear structure. Fatigue estimates are obtained by processing the time-domain signal, and it is a simple matter to incorporate any damage accumulation model desired in the procedure. The method may also be applied to a wide range of complex nonlinear systems. Comparisons are presented of estimated fatigue lives for a nonlinear beam with random excitation obtained using the approximate method and using a conventional numerical simulation. The two techniques are found to give nearly identical results regardless of the level of nonlinearity. The number of calculations required in the approximate method is nearly the same as in a linear system and is not significantly affected by the type and level of nonlinearity in the structure.
Document ID
19900042346
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sun, J. Q.
(State Univ. of New York Binghamton, NY, United States)
Miles, R. N.
(New York, State University Binghampton, NY, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Structural Mechanics
Report/Patent Number
AIAA PAPER 90-0989
Meeting Information
Meeting: AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Location: Long Beach, CA
Country: United States
Start Date: April 2, 1990
End Date: April 4, 1990
Accession Number
90A29401
Distribution Limits
Public
Copyright
Other

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