主题: Development of a composite material with high mechanical properties by the textile technology主讲人: 鮑力民地点: 松江校区纺织学院3004室时间: 2016-10-25 13:00:00组织单位: 纺织学院
报告简介：
Fiber reinforced composites have been used as high performance structure materials in aerospace, automotive industry and other fields, because of their high specific strength and stiffness compared to metal materials. These materials can be defined as fiber reinforced thermosetting plastic (FRP) and fiber reinforced thermoplastic (FRTP) respectively for using different polymer as the matrix. Composites manufactured using thermoplastic materials have several advantages over thermosetting plastic materials, including improved toughness and greater recyclability as well as the possibility of a rapid processing cycle that does not involve chemical reaction. In fiber reinforced plastic materials, one of the most important parameters which have strong influence on the composites properties is fiber volume fraction. In fiber reinforced thermosetting plastic materials the fiber volume fraction is always up to 60 percent, but in fiber reinforced thermoplastic materials it is low to 20 to 30 percent.
In this study, new impregnation method for molding continuous fiber reinforced thermoplastic which is similar to the vacuum assisted resin transfer molding (VaRTM) method in manufacturing fiber reinforced thermosetting plastic was investigated. Fiber volume fraction was significantly raised to 60 percent which is equal to the fiber reinforced thermosetting plastic materials. Comparison between fiber reinforced thermoplastic and fiber reinforced thermosetting plastic materials with the same reinforcing fiber indicated that both materials had similar tensile properties and the proposed molding method is effective in thermoplastic composite manufacture.
It has been reported that reinforcement fiber such as carbon fiber (CF) and glass fiber (GF) can enhance the strength of polymer composites, but reduce the particle erosion resistance of the polymer composites. In our study, the super fibers (Dyneema® and Zylon®) were used as reinforcement to make fiber reinforced polymers (FRPs). Tensile tests and particle erosion wear tests under various impact angles were carried out for comparison with carbon-fiber-reinforced polymer (CFRP), glass-fiber-reinforced polymer (GFRP), and matrix resin. The damaged surfaces of the Dyneema-fiber-reinforced polymers (DFRPs) were analyzed with a scanning electron microscope, and the erosion wear mechanisms of the composites were discussed. It was concluded that it was feasible to develop the FRP materials with low density, high strength, and excellent particle erosion resistance.
报告语言：中文