A new kind of co‐cured sandwich composite was manufactured via inserting tailored damping materials between the lamina to enhance vibration characteristics and sound insulation performance of traditional sandwich composite. The sandwich material was investigated based on the theory of co‐curing, which was superior to the preparation process of traditional sandwich composite. The viscous flow characteristics of epoxy resin and rubber sandwich were considered in the preparation process. The damping characteristics and sound insulation properties of the sandwich composite were determined by the single cantilever beam vibration test and the standing wave tube method. The loss factor of the sandwich composites with damping layer thickness of 0.1 mm reaches 3.384%, which increases by 102.81% compared with that of the undamped composite. The experimental results reveal that the novel damping polymer enhances the damping characteristic and sound insulation performance of laminates significantly compared with previous sandwich composite. The conclusion indicates that the co‐cured composite structures show a strong ability of vibration reduction and sound insulation.

中文翻译：

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新型共固化夹芯复合材料阻尼性能的制备与研究

通过在薄片之间插入量身定制的阻尼材料来制造新型的共固化三明治复合材料，以增强传统三明治复合材料的振动特性和隔音性能。基于共固化理论对三明治材料进行了研究，优于传统的三明治复合材料的制备工艺。在制备过程中考虑了环氧树脂和橡胶夹层的粘性流动特性。通过单悬臂梁振动试验和驻波管法确定了三明治复合材料的阻尼特性和隔音性能。阻尼层厚度为0.1 mm的夹芯复合材料的损耗因子达到3.384％，比未阻尼复合材料的损耗因子增加102.81％。实验结果表明，与以前的三明治复合材料相比，新型阻尼聚合物显着提高了层压材料的阻尼特性和隔音性能。结论表明，共固化复合结构具有很强的减振和隔音性能。