摘要
固化度对CFRP构件最终成型质量起决定性作用,固化度在线监测对于指导航空级复合材料构件的固化工艺控制具有重要意义。针对飞机复合材料构件高质量、高效率固化的实际需求,提出了基于热耗散特征重构的能量-固化度监测方法,实现了准确、无损的CFRP构件固化度在线监测。根据输入能量与整体热能变化差值的时域分布特征,实时重构整体热耗散,实现了固化度直接在线监测。通过有限元仿真与真实试验,验证了方法的有效性,结果表明,本方法在数值仿真模型中的固化度计算误差为2.3%,在实际固化试验中的监测误差为5.0%。
Curing degree determines the final quality of CFRP components,while curing degree online monitoring is significant for guiding the curing process control of aerospace-grade composite components.Aiming at the actual demand for curing aircraft composite components with high-quality and high-efficiency,a curing degree monitoring method based on the reconstruction of heat dissipation characteristics is proposed,which implements the accurate and non-destructive online monitoring of CFRP components curing degree.According to the time-domain distribution characteristics of the difference between the input energy and the overall thermal energy change,the overall heat dissipation is reconstructed in real time so that the curing degree is directly monitored online.The effectiveness of the proposed method is verified by finite element simulation and actual curing experiments.The results show that the calculation error of the curing degree is 2.3%in the numerical simulation model and 5.0%in the actual curing experiments.
作者
沈艳
鲁泳
刘舒霆
郝小忠
SHEN Yan;LU Yong;LIU Shuting;HAO Xiaozhong(Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Nanjing Institute of Technology,Nanjing 211167,China)
出处
《航空制造技术》
CSCD
北大核心
2021年第11期76-85,共10页
Aeronautical Manufacturing Technology
基金
国家自然科学基金(51775261)
江苏省研究生研究于实践创新项目(KYCX18_0319)。
关键词
复合材料
固化在线监测
固化度
能量转化平衡
热耗散
Composite materials
On-line curing monitoring
Curing degree
Energy conversion balance
Heat dissipation
