Sidorenko M. Constructive ways of increasing the load-carrying capacity of connecting joints of main and end beams of overhead travelling cranes

The subject - connecting joints of main and end beams of overhead travelling cranes, the process of crack initiation and growth under cyclic loading. The aim - increasing the load-carrying capacity of connecting joints of main and end beams of overhead travelling cranes. The methods - acoustic emission, kinetic indentation, engineering mechanics techniques, mathematical statistics methods, and numerical methods of a theory of elasticity. The results obtained - there have been established the principles of connecting joints constructive parameters’ influence on fatigue and fracture resistance. On this basis there have been developed some recommendations for the joints’ strengthening. The values of acoustic emission constants for materials for crane steel structures have been found. The methods for estimation the remaining working life of the joints on the stages of crack initiation and growth have been developed. Innovation - the model of probability of damages in joints main and end beams has been created. The model of acoustic emission measure of volume damaging under kinetic indentation has been propounded. The results have been implemented into production. The application sphere – machine building and metallurgical plants.