【作者】 刘宇航；

【导师】 邹广平；

【作者基本信息】 哈尔滨工程大学 ， 力学， 2019， 硕士

【摘要】 玻璃纤维增强聚丙烯基复合材料是一种性能优异的复合材料,具有强度高、延伸率大等优点,在航空航天等领域以及日常生产生活中具有极其广泛的应用。通过合理设计和加工,复合材料可以获得甚至比金属材料更为优越的性能。但是在实际应用过程中,复合材料在爆炸、高速撞击等冲击载荷作用下,会产生很多不确定的变化,容易受到损伤从而导致自身性能的降低。因此对于复合材料的在冲击载荷下的研究,具有很重要的意义。本文选取玻璃纤维增强聚丙烯基复合材料作为研究对象,采用实验和模拟相结合的方式,对聚丙烯纤维增强复合材料在弹体侵彻作用下的性能进行研究和分析,主要研究内容包括:(1)采用模压成型工艺加工制备了玻璃纤维增强聚丙烯基复合材料,并测定了玻璃纤维增强聚丙烯基复合材料层合板的基本力学参数,对成型后的层合板进行了性能分析和评估,并为有限元仿真侵彻过程提供相关材料参数。(2)采用球形弹丸,对玻璃纤维增强聚丙烯基复合材料进行了侵彻试验,得到了弹体侵彻层合板时靶板单位面密度吸收的能量以及层合板的能量吸收率,分析层合板的侵彻性能,得到了层合板在侵彻作用下的相关破坏模式。(3)利用有限元软件仿真模拟了弹体侵彻不同铺层角度的玻璃纤维增强聚丙烯基复合材料层合板的过程,并和侵彻试验的结果进行了对比,二者结果符合得很好。再对复杂铺层角度的层合板进行了仿真计算,得到了最优角度的玻璃纤维增强聚丙烯基复合材料结构。更多还原

【Abstract】 Polypropylene-based glass fiber reinforced composite material is an excellent composite material with high strength and high elongation.It has extremely wide applications in aerospace and other fields as well as daily production and life.Through reasonable design and processing,composite materials can achieve even better performance than metal materials.However,in the actual application process,the composite material has many uncertain changes under the impact load such as explosion and high-speed impact,and is easily damaged,resulting in a decrease in its own performance.Therefore,it is very important for the research of composite materials under impact load.In this paper,polypropylene-based glass fiber reinforced composites were selected as the research object.The combination of experimental and simulation methods was used to study and analyze the performance of polypropylene fiber reinforced composites under projectile penetration.The main research contents include:(1)Polypropylene-based glass fiber reinforced composites were prepared by compression molding process,and the basic mechanical parameters of polypropylene-based glass fiber reinforced composite laminates were measured.The performance of the laminated laminates was analyzed and evaluated.Provide relevant material parameters for the finite element simulation penetration process.(2)The penetration test of polypropylene-based fiber reinforced composites was carried out by using spherical pellets.The energy absorbed by the unit surface density of the target and the energy absorption rate of the laminates were obtained when the projectile penetrated the laminate.The intrusion of the laminates was analyzed.Through the performance,the plywood after penetration was observed,and the relevant failure mode of the laminate under penetration was obtained.(3)The process of polypropylene-based glass fiber reinforced composite laminates with different penetration angles simulated by finite element software was simulated and compared with the results of penetration test.The results are in good agreement..The laminates with complex layup angles were simulated and the optimal angle of polypropylene-based glass fiber reinforced composites was obtained.更多还原