Abstract
The sandwich structure is widely used in bearing and performance because of its high strength, lightweight, and functional integration. Thermoplastic composites have excellent toughness, impact resistance, and damage tolerance. In this paper, (CGF/PP) is used as a panel, and PP is used as the core material. The fully thermoplastic composite sandwich structure panel and core material are melted and connected through the non-isothermal molding process of high-temperature mold forming a low-temperature workpiece. The effects of the heating temperature of the heating plate, the heating time of the sample, the pressure applied during the cooling and forming process, and their coupling on the quality of the face-core connection were studied by the response surface method. The failure mode of the sample after peeling was studied. The stiffness of the whole structure was characterized by a three-point bending test, and the influence of different plate layers on the stiffness of the sandwich structure was discussed. The results show that the optimum process combination is that the heating temperature of the high-temperature die is 262°C, the heating time is 14 s, and the cooling forming pressure is 0.08 MPa. In the three-point bending test, the sandwich structure of the three-layer plate has the largest specific stiffness.
Published Version
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