复合材料胶接修复金属构件残余热应力研究进展

Advances in Research of Thermal Residual Stresses in Bonded Composite Repairs of Metallic Components

复合材料补片胶接技术是一种有效修复飞机受损构件的低成本方法。由于补片与金属材料热膨胀系数的显著差异,会在构件中引入残余热应力。归纳了复合材料修复技术中关于残余热应力的研究热点及成果,涉及常用的残余热应力分析模型、结构约束及固化制度对残余热应力的影响、减小残余热应力的途径等,并对今后的研究工作进行了展望。

Composite patching has been proven to be an efficient and economical method to repair damaged aircraft components. The significant difference in thermal expansion coefficients between the composite patch and the metallic substrate would introduce thermal residual stresses in the components. Research achievements of the thermal residual stresses in composite repairs of metallic components are reviewed, including some widely used models to predict thermal residual stresses, influences of restraint by the surrounding structure and curing cycles on the thermal residual stresses, and methods to minimize the residual stresses. Some recommendations for future work are also presented. repair