关键词: 复合材料, 耐温性能, 抗振动性能, 力学性能

Abstract: The high working temperature on the internal surface of aero-engine outer culvert casing and the influence of complex environmental factors are the difficulties in the repair of the outer culvert casing at present. This paper mainly used ×× epoxy resin as repair adhesive, and the typical specimen with damage depth of 0.5mm are prepared. Through the heat resistance, vibration resistance and mechanical properties of the typical specimen, the feasibility of ×× epoxy adhesive applied to the inner surface repair of aero-engine outer culvert casing was studied. The results show that specimen has no obvious change under 230 ℃ and 280 ℃ high temperature environment and it meets aero-engine outer culvert casing heat resistance requirements. The average strain value of each strain point in vibration experiment is less than 50 με, and the results show that adhesive and composite are in good bonding state after the test. The tensile strength of reparative specimens are similar to the undamaged specimen, and the fatigue strength was slightly decreased, but the results show that both of them meet the requirements of aero-engine outer culvert casing.

Key words: composite, heat resistance, vibration resistance, mechanical properties