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试验研究了复合板的冲击性能。以复合板两种形式(玻璃碳、环氧树脂)施加不断增大的冲击能量,直到样品被完全穿透。能量曲线方法表明了冲击能量和吸收能量之间的关系,它与荷载-位移曲线共同确定复合板的贯穿阈值。通过对比荷载-位移曲线和从冲击面、非冲击面得到的破坏样品图像来评估不同冲击能量下样品的失效过程。也可通过对样品横截面的肉眼观察和讨论来评估损伤程度,如纤维断裂层,层间脱离程度。可以看到,从碳纤维表面进行冲击的复合板的贯穿阈值要比玻璃纤维表面高出大约30%。
Experimental study of the impact properties of the composite board. Apply the increasing impact energy in both forms of composite board (glassy carbon, epoxy) until the sample is completely penetrated. The energy curve method shows the relationship between impact energy and absorbed energy, which together with the load-displacement curve determine the through-threshold of the composite plate. The failure process of samples under different impact energies was evaluated by comparing the load-displacement curve with the images of the damaged samples obtained from the impact surface and non-impact surface. The extent of damage can also be assessed by visual observation and discussion of the cross-section of the sample, such as the degree of fiber breakage, the degree of delamination. It can be seen that the penetration threshold of composite plates impacted from the carbon fiber surface is about 30% higher than the glass fiber surface.