Abstract:

An evaluation approach is presented to the initial fatigue quality of fastener holes, which is characterized by Equivalent Initial Flaw Size Rating (EIFSR) obtained by back extrapolated fractographic data of constant amplitude loading. Then EIFSR criterion and life criterion for initial fatigue quality evaluation and coincidence check are established. Finally, the initial fatigue quality of the fastener hole is evaluated and its coincidence is checked.

Key words: fastener holes, initial fatigue quality, equivalent initial flaw size rating, coincidence check