聚氨酯涂层对碳纤维复合材料层合板抗冲击性能的影响研究

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中图分类号：U270.2 文献标志码：B doi：10.20213/j. cnki. tdcl.2025.02.001

Abstract：Inorder toaddress the local high-speed impact scenarios faced bycarbon fiber composites in the field of rail transit，a numerical simulation study onthe impact damage resistance of polyurethane-coatedcarbon fiber composites to hard objects was carredout.Through the research of high-sped foreign object impact on carbon fiber composites with polyurethane coatings of diferent thicknesss，the influence of polyurethanecoating thicknessand foreign object impact velocity on the impact resistance of carbon fiber composites was determined.The damage morphology，damage area，impact force，penetration depth，energy disipation distribution and other key impact indexes of polyurethanecoated carbon fiber composite laminates under various impact conditions were compared and analyzed.The polyurethane coating significantly enhances the impact resistance of carbon fiber composite laminates under the high-speed impact of low-energy foreign mater. It is found that under a given impact energy，when the thickness of polyurethane coating is 2mm and the impact velocity of foreign matter is 350 km/h ，the impact damage area of carbon fiber composite laminate can be reduced by 73.85% ，the impact force can be reduced by 18.05% ，and the deformation of the back sheet can be reduced by 5.16%

Key words： polyurethane coating；carbon fiber composite；impact simulation; impact resistance

随着高速列车轻量化技术的发展，越来越多轻质高强材料被广泛应用于列车车体制造，不仅降低了车辆运行能耗，还提升了旅客乘坐舒适性。（剩余7522字）