Finite Element Solution of the Interaction Factors between Surface Cracks under Tensile Load

For the fact that surface cracks exist on the surface of structures under complex circumstances due to the factors as erosion or fatigue and the interaction exists in adjacent cracks under fatigue loading, the structure is to be wrecked faster. In order to describe the influencing rules among cracks in rations, The parameter finite element method and circulated iterative algorithm are used to make an simulating calculation with a finite thickness plate with two semi-elliptical surface cracks under tension loading, thus obtaining the stress intensity factors of cracks in different places. The result provides a theoretical reference to analyze the remaining stress and fatigue span of the structure with multiple surface cracks in three dimensions.