Research on damage characteristics of T800 carbon fiber plate under typical hail impact load
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摘要: 摘要:为研究民航客机用高性能碳纤维复合材料的冰雹撞击损伤特性,通过试验首先对冰球在高速冲击下的撞击力特性进行研究,给出了冲击力时程曲线以及峰值冲击力与冰球动能的线性增长关系;随后对T800/3200碳纤维复合材料层合板进行单次冰球撞击,根据高速摄影发现其损伤形态和损伤程度与冰球的初速度有关,同时超声C扫描结果表明其内部层间脱粘面积与冰球撞击时的动能呈线性增长关系;而后又对相同厚度的靶板进行了冰球重复撞击试验,其宏观损伤程度随撞击次数增加而加重,且碳纤维板中心点挠度与冰球累积动能呈二次关系,并最终呈现前后贯穿且伴有大量纤维拔出的损伤形态。
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Abstract: Abstract: In order to study the hail impact damage characteristics of high performance carbon fiber composite used in civil aircraft, this paper firstly studied the impact force characteristics of the ice sphere under high-speed impact through experiments, and come out with the impact time history curve and the linear growth relationship between the peak impact force and the kinetic energy of the ice sphere; then, a single ice sphere impact was carried out on the T800/3200 carbon fiber composite lamination board. According to the high-speed photography, it was found that the damage form and damage degree were related to the initial speed of the ice sphere. Meanwhile, the ultrasonic C-scan results showed that there is a linear relationship between the internal interlayer unstick area and the kinetic energy of the ice ball impact; After that, ice sphere impact tests were carried out on the same thickness of the target plate for several times, and the macro damage degree increased with the increase of the number of impacts. And the center deflection of the carbon fiber plate has a quadratic relationship with the accumulated kinetic energy of the ice sphere, and finally the damage pattern of front and back penetration with a large number of fibers pulled out was presented. -
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