Abstract

In accordance with the metal-composite structure ice impact status, an experiment of Ice Impact on Aluminum/Carbon Fiber Reinforced Composite dual plate was carried out to study the dynamic responses and damage of the target dual plate. The artificial ice ball with a diameter of 35 mm was launched by a 37 mm gas gun test system to impact the metal face of the plate, high-speed photography was used to measure the launching speed of ice balls and record the impact process. The internal damage of composite plate and the displacement of metal part were measured. Experiment results showed the external damage of the composite plate was mainly manifested by the shallow elliptical impact dent formed on the impact surface contacted with the aluminum plate, with the increase of the impact energy level, the damage on the back of the plate became more serious. When the impact energy reached 400 J, the back of the plate was damaged by fiber breakage. The internal damage measurement results showed The internal delamination shape of the [0/90]_4s plate and the [0/45/90/-45]_2s plate were similar to that of the cross-shaped and plum blossom-shaped laminates, respectively, and the delamination failure was mainly caused by interlaminar shear stress due to the different bending stiffness between layers.

摘要

针对金属-复合结构冰冲击状况，开展了铝/碳纤维增强复合材料双板冰冲击试验，研究了靶材双板的动力响应和损伤情况。将直径35毫米的人造冰球通过37毫米气枪测试系统发射撞击板的金属面，采用高速摄影测量冰球的发射速度并记录撞击过程。测量了复合板的内部损伤和金属部分的位移。实验结果表明，复合板的外部损伤主要表现为与铝板接触的冲击面上形成的浅椭圆形冲击凹痕，随着冲击能量水平的提高，板背损伤越来越严重。 . 当冲击能量达到 400 J 时，板的背面因纤维断裂而损坏。内部损伤测量结果显示[0/90]的内部分层形状_4s板和[0/45/90/-45] _2s板分别与十字形和梅花形层合板相似，分层破坏主要是由于不同弯曲引起的层间剪切应力层间刚度。