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三角形截面碳纤维在复合材料内部的排布结构像微波暗室一样,能够对入射的电磁波进行多次反射,从而衰减电磁波,使三角形截面碳纤维复合材料具有吸波性能,因此,研究三角形截面碳纤维在复合材料中的排布规律对研究其吸波机理非常重要。采用实验和模拟的方法对三角形截面碳纤维在复合材料中的排布规律进行了分析。首先,通过扫描电子显微镜(SEM)观察了多组三角形截面碳纤维复合材料试样的截面微观形貌,分析了三角形碳纤维在复合材料中的排布角度及均匀性;其次,为进一步研究三角形截面碳纤维复合材料的吸波机理,根据蒙特卡洛原理,通过Matlab软件对三角形截面碳纤维在复合材料中的排布情况进行了模拟。实验及数值模拟结果吻合较好,均表明三角形截面碳纤维在复合材料中的排布是以各种排布角度随机排布的,而三角形碳纤维分布是比较均匀的,没有明显的密布区域和稀疏区域,该模拟方法可以用于模拟不同含量的三角形截面碳纤维在复合材料中的排布规律。
The arrangement structure of triangular cross-section carbon fiber in the composite material is the same as the microwave anechoic chamber, which can reflect the incident electromagnetic wave multiple times to attenuate the electromagnetic wave and make the triangular cross-section carbon fiber composite material have absorbing performance. Therefore, In the arrangement of the law of its absorption mechanism is very important. The regularity of arrangement of triangular cross-section carbon fiber in composite materials was analyzed by means of experiment and simulation. First, the cross-sectional micrographs of several groups of triangular cross-section carbon fiber composite materials were observed by scanning electron microscope (SEM), and the angle and uniformity of the triangular carbon fibers in the composite materials were analyzed. Secondly, in order to further study the triangular cross-section carbon fiber According to the principle of Monte-Carlo, the arrangement of triangular cross-section carbon fibers in composite materials was simulated by Matlab software. The experimental results agree well with the numerical results, indicating that the arrangement of the triangular cross-section carbon fibers in the composite material is randomly arranged in various arrangement angles, while the triangular carbon fiber distribution is relatively uniform with no obvious dense areas and sparse areas The simulation method can be used to simulate the arrangement of triangular cross-section carbon fibers with different contents in composite materials.