Research on damage characteristics of T800 carbon fiber plate under typical hail impact load

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.