Dependence of Fatigue Damage on Loading Amplitude Variability

by Loren D. Lutes, Texas A&M Univ, United States,
Shahram Sarkani, Texas A&M Univ, United States,



Document Type: Proceeding Paper

Part of: Probabilistic Methods in Civil Engineering

Abstract: Welded steel specimens have been tested under variable amplitude loadings to determine the extent to which fatigue life is affected by the rate of amplitude variability of the loading process. It appears that the rate of variation can significantly change the rate of fatigue damage. Comparisons have been made between the experimental results and commonly used analytical techniques such as the Rayleigh approximation and the rainflow analysis.

Subject Headings: Steel structures | Load tests | Load factors | Fatigue tests | Approximation methods | Structural analysis | Welding | Fatigue life

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