A hydraulic fatigue test machine was manufactured using a personal computer and a proportional valve, a hydraulic system. This machine was controlled loading waves and stress ratios, frequency by personal computer. A numerical simulation for the dynam...
A hydraulic fatigue test machine was manufactured using a personal computer and a proportional valve, a hydraulic system. This machine was controlled loading waves and stress ratios, frequency by personal computer. A numerical simulation for the dynamic quality of this machine was done by 4 order Runge-Kutta method. Corrosion fatigue crack growth behaviors of SPH41 in 3% NaCl aqueous solution were investiged with this machine. Corrosion fatigue crack growths of this steel were reduced than the uncoated steel by anti-corrosion effect of zinc.