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Advanced Structural Analysis/Part I - Theory/Failure Modes/Fatigue/Crack Initiation/Loading
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Introduction
/Influence of Mean Stress/
/Load Spectra/
Introduction
Fatigue life is influenced by virtually every thinkable aspect of the applied loading history, such as:
Stress amplitude
Mean stress
Loading frequency
Waveform
Loading direction
Combined effect of complex stress filed
Chronology
The effect of some of these influences can be quantified with fairly good accuracy whilst the effect of other influences must be regarded in a more qualitative sense.