碳纳米管薄膜电加热固化复合材料胶接修补金属结构研究  

ON REPAIR OF METAL STRUCTURES WITH COMPOSITE PATCHES CURED BY CARBON NANOTUBE FILM RESISTANCE HEATING

作　　者：张宁[1] 严刚[1] ZHANG Ning;YAN Gang(State Key Laboratory of Mechanics and Control of Mechanical Structures,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空学院机械结构力学及控制国家重点实验室,南京210016

出　　处：《复合材料科学与工程》2021年第5期49-54,共6页Composites Science and Engineering

基　　金：航空科学基金(2017ZA52005);江苏高校优势学科建设工程资助项目。

摘　　要：近年来,复合材料胶接修补技术被广泛应用于金属损伤结构,但传统补片固化工艺有着成本高、能耗大及成型时间长等问题。针对该问题,本文提出将碳纳米管薄膜作为加热元件与复合材料预浸料补片进行集成,通过电加热固化达到修补损伤结构的目的。进行了试验研究,分别采用碳纳米管薄膜电加热和传统烘箱加热的方法固化复合材料补片修补含裂纹铝合金板,对比不同固化方法下所需能耗和成型时间,并进行力学性能测试,评估胶接修补的效果。结果表明:碳纳米管薄膜电加热固化技术是一种节能高效的方法,可以显著降低能耗和材料成型时间;同时碳纳米管薄膜电加热固化修补的试件承载力与烘箱固化修补的试件基本一致,可以达到预期的修补效果,为金属结构低能耗、低成本胶接修补技术提供了一种新的思路。In recent years,composite material bonding repair technology has been widely used in damaged metallic structures,but the traditional patch curing process has problems like high cost,high energy consumption and long molding time.In response to this problem,this paper proposes to integrate the carbon nanotube film(CNTF)as a heating element with the composite prepreg patch,and achieve the purpose of repairing the damaged structure through electric heating and curing.Experimental studies have been conducted by using CNTF electric heating and traditional oven heating methods to cure the composite patches to repair cracked aluminum alloy plates.The energy consumption and curing time required under different methods have been compared,and tests have been conducted to evaluate the mechanical performance of the repaired structures.The results have demonstrated that the CNTF electric heating and curing technology is an energy-saving and energy-efficient method,which can significantly reduce energy consumption and material forming time.Meanwhile,the bearing capacity of the test specimens repaired by CNTF electric heating is similar to that of the test specimens repaired by oven heating,providing a new way for bonding repair of metallic structures with low energy consumption and low cost.

关 键 词：碳纳米管薄膜 电加热固化 复合材料胶接修补 金属损伤结构 修补性能 

分 类 号：TB332[一般工业技术—材料科学与工程]