摘要
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。
The resistance to repeated low-velocity impact of PU coated composite laminates of different thickness was evaluated. The composite laminates were fabricated by compression molding method, and then were sand-blasted in order to increase their surface roughness, and finally were coated with PU of the same thickness. The composite laminates with and without PU coating were impacted repeatedly using a pressure-assisted Instron-Dynatup 9250 instrumented drop-weight impact tester until all the specimens were perforated, and then ultrasonic C-scan was used to detect the delimitation area after testing. It is observed that the influence of PU on the resistance to repeated impact of composite laminates is gradually decreasing after repeated impacting with the increasing of impacted energy, so the damage area of specimens are increasing after repeated impact. In addition, with the increasing thickness of composite laminates, the influence of PU acting on the resistance to repeated impact for all laminates is enhanced so that the damage area of specimens is gradually decreasing.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2016年第5期379-387,共9页
Chinese Journal of Materials Research
基金
天津市科技计划项目13TXSYJC40500
天津市高等学校科技发展基金计划项目2012ZD02资助~~
关键词
复合材料
聚氨酯涂层
吸收能量
冲击损伤面积
最大冲击载荷
抗反复冲击性能
composite, polyurethane coating, absorbed energy, impact damage area, maximum impact force, repeated impact performance
