Crack front edge normal out-of-plane expansion method, device and equipment and storage medium

The embodiment of the invention discloses a crack front edge normal out-of-plane expansion method, device and equipment and a storage medium. The method comprises the following steps: constructing a crack front edge normal out-of-plane expansion model according to a composite crack expansion theory in three-dimensional fracture mechanics and a deflection effect of fracture parameters on a crack expansion direction; according to the crack front edge normal plane external expansion model, determining a crack front edge normal plane internal expansion angle and a crack front edge normal plane external expansion angle when the crack expansion direction of the crack front edge node is the strain maximum value direction; determining an expansion distance of the crack front edge node according to the equivalent stress strength factor of the crack front edge node and a preset expansion condition; and according to the normal in-plane expansion angle, the normal out-plane expansion angle and the expansion distance, det