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采用上下层为树脂基复合材料,中间为阻尼层,复合材料与阻尼层通过锁式缝合进行连接制得三维缝合夹层结构复合材料。通过对三维缝合结构中的芯材进行设计,选用不同的阻尼材料,以得到既具有较佳阻尼性能,又具有一定结构强度的复合材料。通过测定三维缝合夹层结构复合材料的各项性能,得到的最佳体系是采用环氧树脂复合材料结构层、阻尼层为丁苯橡胶的三维缝合夹层结构,其阻尼比为2.72,弯曲强度为37.84 MPa,弯曲模量达到0.92 GPa,冲击韧性为152.2 kJ/m2。
The upper and lower layers are made of resin-based composite material, the middle layer is a damping layer, and the composite material and the damping layer are connected by a lock stitch to obtain a three-dimensional stitched sandwich structure composite material. Through the design of the core material in the three-dimensional stitched structure, different damping materials are selected to obtain the composite material which has both good damping properties and certain structural strength. By measuring the properties of the three-dimensional stitched sandwich composite structure, the best system obtained is the three-dimensional stitched sandwich structure with the epoxy resin composite structural layer and the damping layer being styrene-butadiene rubber with a damping ratio of 2.72 and a flexural strength of 37.84 MPa, flexural modulus of 0.92 GPa, and impact toughness of 152.2 kJ / m2.