Experimental and numerical studies on low‐velocity impact damage of composite laminates toughened by nickel‐coated carbon fiber veil
Experimental and numerical studies on low‐velocity impact damage of composite laminates toughened by nickel‐coated carbon fiber veil
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DOI：
10.1002/pc.26555
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发表时间：
2022-02
影响因子：
5.2
通讯作者：
Hui Liu;P. Qu;Yunli Guo;Yong Zhou;Guoshun Wan;Yuxi Jia
中科院分区：
文献类型：
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作者：
Hui Liu;P. Qu;Yunli Guo;Yong Zhou;Guoshun Wan;Yuxi Jia
对镀镍碳纤维（NiCF）纱网夹层增韧碳纤维复合材料层合板的低速冲击响应进行了实验和数值研究。实验结果表明，在中板插入一层34 g/m2的NiCF纱后，复合材料的抗冲击性能得到改善，尤其是冲击峰值力和剩余压缩强度提高了16.15%，损伤面积减小了30.92%。其增强机理是由于NiCF纱的断裂、拔出和裂纹桥接以及镍涂层的剥离，这增强了碳纤维/树脂界面粘合。建立了基于连续损伤力学和粘聚区模型的数值模型，并验证了模型的有效性。模拟结果证实，NiCF面纱通过增强层合板的层间性能来减少能量吸收，从而减少冲击损伤。此外，具有较高面密度和较多NiCF面纱层数的层合板具有较高的冲击力和较小的损伤面积，因此具有较好的抗冲击性。
The low‐velocity impact response of carbon fiber composite laminates toughened by nickel‐coated carbon fiber (NiCF) veil interleaves was investigated experimentally and numerically. The experimental results indicated that the impact resistance of laminates with a layer of NiCF veil of 34 g/m2inserted in the midplane was improved, especially in terms of increased peak impact force and residual compressive strength (by 16.15%), and reduced damage area (by 30.92%). The enhancement mechanisms were attributed to the breakage, pull‐out, and crack bridging of the NiCF veil, as well as the peeling of nickel coating, which enhanced the carbon fiber/resin interfacial adhesion. A numerical model based on continuum damage mechanics and cohesive zone model was developed and its validity was verified. The simulation results confirmed that NiCF veils reduced energy absorption by enhancing the interlaminar properties of laminates, thereby reducing impact damage. Moreover, laminates with higher areal density and more layers of NiCF veils had higher impact force and smaller damage area, and thus had better impact resistance.