Method and device for determining position of airplane structure fatigue crack arrest hole

The invention provides a method and device for determining the position of a fatigue crack arrest hole of an aircraft structure. The method comprises the steps of determining a crack track and crack tip coordinates in the aircraft structure with cracks; establishing a stress intensity factor finite element model of the crack-containing aircraft structure according to the crack track and the cracktip coordinates; according to a stress calculation result of the stress intensity factor finite element model and a fracture mechanics method, acquiring a crack tip stress intensity factor; obtaininga crack tip extension direction extension angle of the crack; obtaining a tangent line of a crack track of the crack; acquiring a ray according to the tangent line and the expansion angle; and determining a point at a preset distance L from the tip of the crack on the ray, i.e., the central position of the crack arrest hole of the crack. By means of the method, the problem that the position of thecrack arresting hole is no