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This document discusses modifying spectral fatigue methods for S-N curves using coefficients from MIL-HDBK-5J. It presents formulas to represent S-N curves with up to four coefficients, and describes how to calculate fatigue damage from stress time histories and power spectral densities using the Dirlik and narrowband methods embedded in a Palmgren-Miner cumulative damage calculation. An example application to a fixed-fixed beam subjected to base excitation is provided to illustrate the fatigue analysis pro

Author

Rick

Language

EN