A method of SIF calculation which is suitable for complex structures and loads was described in detail and verified by comparing with several empirical formulas.

A method of generating the fatigue loading spectrum for marine structures based on a design wave approach was introduced in this study to solve the problem of the definition of nominal stress.

A combination of the fatigue load spectrum generation method, SIF calculation method and the unique curve fatigue crack growth model has provided a procedure for fatigue life prediction based on fracture mechanics for ship details and other ocean engineering structures.