A super-singular integral equation method for the slat-collinear crack problem

super-singular integral equation;  stress intensity factor;  Unlimited slats

Slatted components are frequently used in structural engineering, and most of the research on fatigue failure of slats is limited to experimental methods, while few are theoretically analyzed from the perspective of fracture mechanics. In view of this situation, the problem of symmetric collinear cracks in planar infinite slats is studied by integral transformation, and according to the mixed boundary conditions, the problem is reduced to a super-singular integral equation with the dislocation of the crack surface as an unknown function in the sense of finite integral, and the corresponding numerical calculation method is established, and the calculation formula of stress intensity factor is given. Finally, the mutual influence between cracks is analyzed by numerical example.