赤外線計測とPGD法を用いた製造プロセスにおけるCFRPの熱伝導特性評価

抄録

Infrared thermography has been proposed as a method to detect the configurations of prepreg/tape lay-ups and process-induced defects in the manufacturing process of CFRP (Carbon Fiber Reinforced Plastics) laminated structures. For this purpose, the transient responses were measured and compared with the theoretical or numerical models, to detect the change from the reference solution to the heat conduction characteristics of CFRP. Here, high-speed image processing is necessary for the application to the actual manufacturing sites. The present study attempted to employ the Proper Generalized Decomposition (PGD) method for obtaining computationally efficient solutions of heat conduction problems required in the thermography inspection of CFRP. We also presented a method to evaluate heat conduction characteristics in the preforming process using CFRP layup tapes with AP-PLY configuration as an example. The results demonstrated that the proposed method could capture the variation in the heat conduction inside the material depending on the contact state between the tapes.