Scatter-band and Reliability Analysis on High-cycle Fatigue Behavior of Bovine Compact Bones

In the present research, the scatter-band and reliability analysis has been performed on the high-cycle fatigue behavior of bovine compact bones. For this objective, experimental data including fatigue lifetimes and stress levels under three different loading frequencies, have been analyzed for the statistical investigation. Therefore, rotary bending fatigue testing has been utilized at 10, 20 and 30 Hz of the loading frequency, on about 50 cylindrical specimens from compact bones of the 12-month old bovine. For the scatter-band analysis, three confidence levels (85, 90, and 95%) were selected. Then, lower/upper bands were drawn for various target functions, such fatigue lifetimes and the ratio of fatigue lifetimes to stress levels, versus the loading frequency. For the reliability analysis, three different distribution functions were considered, including normal, smallest extreme value, and extreme maximum value distributions. Then, probability density and cumulative distribution functions have been obtained based on fatigue lifetimes.