Experimental investigation of short time thermal cycle effect on the fatigue behavior of interference fitted fastner holes combined with bolt clamping force on Al-alloy 7075-T6 plate

The process of interference fit and bolt clamping force are two effective techniques for improving the fatigue life of the joints and are used in various industries, especially in aerospace and automotive .Most of the previous studies have investigated separate effects of the interference fit and bolt clamping force on the fatigue life of the specimens. In the present research fatigue behavior of interference fitted specimens combined with bolt clamping force has been investigated yet. On the other hand, the pervious researches on the interference fit and bolt clamping force have been studied at laboratory temperature and the effect of temperature changes has not been investigated. To investigate the effect of temperature on the fatigue life of specimens, two different temperatures (i.e. 60°C and 120°C), aside from room temperature, were selected and fatigue life of specimens are studid at these tempratures. The fatigue tests were performed on the specimens of Al-alloy 7075-T6 alloy to obtain S-N data