××环氧胶黏剂用于某航空发动机外涵机匣内表面修复的可行性研究

FEASIBILITY RESEARCH OF ×× EPOXY ADHESIVE USED FOR REPAIRING THE INNER SURFACE OF AERO-ENGINE OUTER CULVERT CASING

航空发动机复合材料外涵机匣内表面工作温度高,且受复杂环境因素影响,是当前外涵机匣修理的难点。本文主要以××环氧树脂为修补胶黏剂,制备了0. 5 mm损伤深度的典型试验件,通过典型修补试验件的耐温性能、抗振动性能及力学性能,对××环氧胶黏剂用于外涵机匣内表面修复的可行性进行了研究。研究结果表明:试验件在230℃及280℃的高温环境下未发生明显变化,满足外涵机匣耐温试验要求;振动实验中各应变点的应变值平均值均小于50με,试验后胶黏剂与复合材料保持良好的胶接状态;修补后试验件的拉伸强度与未损伤试样的强度相当,疲劳强度略有降低,但均满足外涵机匣对于静力及疲劳强度的要求。

The high working temperature on the internal surface of aero engine outer culvert casing and the in fluence 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.