Fatigue Life Analysis of Gantry Crane

Gantry cranes are widely used in ports for transshipment of building materials, containers, lumber and other cargo. They are usually used in open-type warehouses, their advantages include ease of manufacture and operation, short installation time. The results of this study represent a base for future predictions for the number of attacks and ransomware strains. In the study of defects in metal structures of gantry cranes, the parameters of crack resistance are determined, on the basis of which their resource is determined. The experimental kinetic diagrams of the fatigue fracture of the material demonstrated that crack growth accelerated more strongly in the range of K = 11…21 MPa·m1/2, where the asymmetry of the load cycle causes a 1.3–2 times increase in crack growth. At R = 0.6, there is already no crack closure effect, a decrease in the fatigue threshold, and an intensification of crack growth over the entire ΔK range. This is consistent with the data on the kinetics of fatigue crack growth at the Peris site.