State-owned Wuhu Machinery Factory
The high efficiency and low cost repair of perforation damage of aluminum honeycomb sandwich structure is of great significance to ensure the integrity of aviation equipment.In this paper, the intact and perforated aluminum honeycomb sandwich samples were designed and prepared. Four point bending failure test and finite element simulation analysis were carried out on intact, perforated and repaired composite material specimens. The experimental and simulation results show that the bending strength of aluminum honeycomb sandwich structure can be effectively restored by using composite materials bonding method . The results of finite element simulation are in good agreement with the experimental results. The simulation model can accurately calculate the ultimate load and failure mode of all kinds of samples. The simulation results show that when the damage range is ≤φ30mm (diameter to width ratio is less than 40%), the adhesive repair technology of composite materials can be applied to the damage repair of aluminum honeycomb sandwich structures of aircraft.