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| Online Monitoring Method for Curing Degree of Aircraft Composite Components |
| SHEN Yan1 , LU Yong2 , LIU Shuting1 , HAO Xiaozhong1 |
| (1. Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 2. Nanjing Institute of Technology, Nanjing 211167, China) |
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Abstract 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.
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2021, 
