A METHOD OF INCREASING CYCLIC CRACK RESISTANCE OF STEEL OF MARINE PORT STRUCTURES

Abstract

A method of increasing cyclic crack resistance of structures of lifting and handling equipment of marine ports using a special technological environment is proposed. The mechanism of the positive effect consists in retarding the stage of crack propagation by creating the artificial crack closure effects. Experiments were carried out on the steel 09Г2С of walls of the cargo winch of the gantry crane. Complete retardation of crack growth in the medium-amplitude region of the load have been achieved using the method. Evaluations of crack closure showed its responsibility for the obtained effects.