RESEARCH AND APPLICATION OF CRACK PROPAGATION SECURE ESTIMATING AND INSPECTING FOR CRANE MECHANICAL OF SHANGHAI PORT

摘要

The port crane mechanics is the most major equipment for ports operation. Many of them have been put into use for decade or more years and will be still employed because of heavy duty and shortage of renewal capital. It is an urgent requirement for the ports to secure estimating and inspecting especially when the cracks appear in the crane. In generally, the Paris’s model is applied for crack propagation life. To simplify the secure estimating process, the Paris’s formula is put forth as the form of the relation between stress value and crack length. The method how to get the stress value is studied to crack propagation secures estimating through Paris’s formula. The Shanghai Port Cooperation applies the method to all kinds crane to ensure the crane security and the port run normally. Their estimating process to a crane and inspecting experience also are set forth in the paper.