嵌入式共固化高阻尼电磁吸波复合材料

提出多层吸波预浸料层和吸波阻尼层相互嵌合的结构，研发了一种兼具优良电磁吸波性能、高阻尼性能以及其他优良静力学和动力学性能的嵌入式共固化高阻尼电磁吸波复合材料，探索其制备工艺，推导了这种结构的电磁反射损失的理论表达式，并根据理论计算表达式编写Matlab程序理论分析了该结构的吸波性能。电磁吸波的实验结果，验证了该分析结果的有效性。模态实验、自由衰减实验和层间剪切实验结果给出了模态参数、阻尼性能以及层间剪切性能与阻尼层电磁吸波材料含量的关系。结果表明：随着试件电磁吸波材料含量的提高试件的反射损失变小，电磁吸收频宽增大，模态固有频率降低，模态阻尼比增加，阻尼损耗因子增加，层间剪切应力增强。

Embedded Co-cured High Damping and Electromagnetic Absorbing Composite

A multi-layered electromagnetic absorbing composite was proposed to have the structure composed alternately of absorbing prepreg layer and absorbing damping layer, thus the embedded co-curing composite with excellent electromagnetic absorbing property and high damping property as well as other excellent static and dynamic properties was developed. The theoretical expression of the electromagnetic reflection loss of the structure was deduced, and the absorbing performance of the structure was theoretically analyzed by using MATLAB program based on the theoretical expression. The electromagnetic absorbing test verified the validity of the theoretical results. Modal test, free decay test and interlinear shear test obtained the variation curve of modal parameters, damping performance and interlamellar shear performance with the content of electromagnetic absorbing material. The experimental data show that with the increase of the content of electromagnetic absorbing materials in the composite, of which the reflection loss and the modal natural frequency decrease, the electromagnetic absorption bandwidth, the modal damping ratio and the damping loss factor increase, whereas, the interlamellar shear stress enhances.