Fatigue strength and weight optimization of threaded connections in tie-rods for aircraft structures

Thus, cyclic fatigue tests with a load ratio of R = 0.01 are performed to investigate the influences of thread insert length and position on the fatigue life of three different configurations. The experimental results are explained by Finite Element analyses using a detailed Finite Element model of the threaded connection. Finally microscopic examinations as well as the Finite Element analyses are utilized to further optimize the threaded connection in terms of reduced weight and high fatigue strength.