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本文采用模压成型工艺制备出三种不同厚度的复合材料层合板,对其表面进行喷砂粗糙处理后喷涂相同厚度聚氨酯,制备聚氨酯喷涂复合材料层合板。使用落锤冲击试验机反复冲击复合材料裸板与喷涂过聚氨酯的复合材料层合板,直到其完全穿透,通过超声波C扫描检测对冲击后试样的分层面积进行分析。结果表明:随着冲击能量增大,聚氨酯对复合材料层合板抗反复冲击性能的影响逐渐减弱,冲击后试样的损伤面积逐渐增大;随着层合板厚度的增加,聚氨酯对复合材料层合板抗反复冲击性能的影响增强,致使试样冲击后损伤面积减小。
In this paper, three different thicknesses of composite laminates were prepared by compression molding. The surface of the composite laminates were sprayed with the same thickness of polyurethane after being sandblasted and roughened, and the polyurethane-sprayed composite laminates were prepared. The impact strength of composite composite panels and polyurethane-coated composite laminates was repeatedly applied using a drop weight impact tester until they were completely penetrated. The delamination area of the impacted specimens was analyzed by ultrasonic C-scan. The results show that the impact of polyurethane on the repeated impact resistance of composite laminates gradually decreases with the increase of impact energy, and the damage area of specimens increases gradually with the increase of impact energy. With the increase of laminate thickness, Anti-repeated impact of the impact of enhanced performance, resulting in reduced impact damage area after the sample.