为探索复合材料内部的微裂纹损伤,将水平和垂直方向的光纤等距排布,制备复合材料光纤阵列预浸料,并嵌入复合材料结构中,制成碳纤维-光纤复合材料板。搭建了实时在线识别裂纹损伤的光纤阵列复合材料板测损系统,基于复合材料损伤位置和光纤损伤位置的一致性,利用内光电效应,通过采集光电传感器的感光电压判断碳纤维-光纤复合材料板的光纤受损情况,水平和垂直的双向光纤阵列会给出具体损伤位置坐标,进而判断出相应位置复合材料受损情况。预先在复合材料内部制造损伤,通过实验数据与实际损伤进行对比,数据表明:实时在线识别裂纹损伤的光纤阵列复合材料板测损系统可以准确高效地识别出复合材料内部裂纹损伤位置及大小。
To explore microcrack damage in composite materials,the optical fibers in the horizontal and vertical directions were equidistantly arranged to a composite fiber array prepreg,which was embedded into the composite structure to produce a carbon fiber-optic fiber composite material plate.An optical fiber array experimental platform for real-time online identification of crack damage was established.Based on the consistency of the composite material damage location and the optical fiber damage location,using the internal photoelectric effect,the optical fiber damage condition of the optical fiber composite plate was determined by collecting the photosensitive voltage of the photoelectric sensor.The horizontal and vertical bidirectional optical fiber array could provide specific damage location coordinates,and then determine the damage situation of the composite material at corresponding location.Damage was created inside the composite material in advance.By comparing experimental data with actual damage,the fiber optic array system for real-time online identification of crack damage could accurately and efficiently identify the location and size of internal crack damage of composite materials.
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基金资助
国家自然科学基金(52075280);山东省自然科学基金(ZR2019ME088)
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