Notched metal test samples are presently subjected to helicopter load histories and the results obtained are compared to the fatigue-life predictions of a simplified version of the local-strain method. After studying the case of a peak/valley reconstructed history based on the standard spectrum, attention is given to a second, more irregular one based on actual flight data which is used to generate three reconstructed histories based on peak-valley, to-from, and rainflow characteristics. Comparisons indicate the rainflow cycle approach to be the most promising.
Analysis and reconstruction of helicopter load spectra
National Technical Specialists'' Meeting on Advanced Rotorcraft Structures ; 1988 ; Williamsburg, VA, United States
1988-01-01
Conference paper
No indication
English
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