Experiment of ice ball impacting glass fiber laminate

Abstract

As a solid form of water, ice has brought a lot of technical challenges to aviation, ships, bridges and other related engineering fields, the technical fields such as the impact protection strength of aircraft and the strength design of icebreakers need to consider the influences of ice impact on structural strength and reliability. Therefore, in order to solve such problems, this paper takes the hail disaster as the background, and applies a first-level air gun to use 50.8mm (2inch) and 25.4mm (1inch) diameter ice balls to conduct impact experiments on glass fiber laminates at various speeds(2inch ice ball for 5 speeds, 1inch ice ball for 3 speeds). As the results, the specific support force of the laminated plate and its back plate strain under different working conditions are obtained. It is found that the impact reaction force of the 1 inch ice ball is basically proportional to the impact energy, and the law of the 2 inch ice ball is slightly different due to the fixing method of the laminated plate; in terms of strain caused by impact, it is concluded that the maximum strain at the contact portion of a 1 inch ice ball at an impact speed of 88 m / s is 10300 με; at the same time, a high-speed camera was used to record the process of the ice ball impacting the target plate, and the damage of the ice ball at the instant of impact and the deformation form of the laminated plate were observed and analyzed.