Research on Rapid Shaped-Charge Cutting Technology of Aircraft Damaged Thin-Wall Structures

摘要

Shaped-charge cutting technology has been introduced into the field of aircraft structure repair to rapidly reshape irregular holes in thin-walled structures. In the present research, numerical calculation of the dynamic cutting process by ANSYS and experiments on shaped-charge cutting of a 2 mm-thick plate from 2A12 aluminum alloy have been carried out. It was found that rapidly produced cut/kerf is smooth and exhibits neat rectilinear edges. The incision fracture section has corrugated boundaries with clean surfaces, while the lower part has no jet penetration traces. The target plate separation method of cumulative cutting is characterized by pre-penetration and late tear patterns. The application of shaped-charge cutting technology is very lucrative for rapid repair of aircraft thin-walled structural damages.