Extreme temperature influence on low velocity impact damage and residual flexural properties of CFRP

IF 4.8 2区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Irene Bavasso, Claudia Sergi, Luca Ferrante, Marzena Pawlik, Yiling Lu, Luca Lampani, Jacopo Tirillò, Fabrizio Sarasini
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Abstract

In this work, the behavior of carbon fiber reinforced polymer composites (CFRPs) interleaved with electrospun veils under low velocity impact (LVI) conditions and extreme environmental temperatures was investigated. 2/2 twill carbon fiber/epoxy laminates were subjected to LVI at three energy levels (10, 20, and 30 J), and three temperatures (−50°C, room temperature, and 100°C). Two interleaved configurations were explored (six veils placed symmetrically with respect to the middle plane of the laminate and with respect to the external layers of the laminate). Particularly at room temperature and up to 20 J, nanofibrous interlayers effectively reduced localized deformation (by about 13.0%) and delamination (by about 12.2%) when positioned in the outer ply interleaved configuration compared to the reference laminate. At 100°C, this effect is maintained at 10 J, preventing an increase in the delaminated area. At −50°C and 10 J, the promotion of delamination prevented back surface fiber failure. Regarding post‐impact flexural properties, the presence of nanoveils ensured superior mechanical properties compared to the corresponding reference laminate impacted at the same conditions, demonstrating their efficacy in enhancing the damage tolerance of the overall laminate.Highlights Electrospun veils were interleaved in 20 layers of 2/2 twill carbon/epoxy laminate. Three configurations were tested under LVI at 10 J, 20 J, 30 J, and −50°C, RT, and 100°C. Observed damage modes include delamination, indentation, and back surface fiber cracks. Veils symmetrically placed in external layers limit delamination at 20 J (RT) and 10 J (100°C). Electrospun veils enhanced CFRP bending and residual post‐impact properties at RT and 100°C.

Abstract Image

极端温度对 CFRP 低速冲击损伤和残余弯曲性能的影响
在这项工作中,研究了在低速冲击(LVI)条件和极端环境温度下,与电纺纱交错的碳纤维增强聚合物复合材料(CFRP)的行为。2/2 斜纹碳纤维/环氧层压板在三种能量水平(10、20 和 30 J)和三种温度(-50°C、室温和 100°C)下受到低速冲击。研究了两种交错配置(相对于层压板中间平面和层压板外层对称放置六个面纱)。与参考层压板相比,特别是在室温和高达 20 J 的条件下,纳米纤维夹层能有效减少局部变形(约减少 13.0%)和分层(约减少 12.2%)。在 100°C 和 10 J 条件下,这种效果得以保持,从而防止了分层面积的增加。在 -50°C 和 10 J 的条件下,分层的促进作用可防止背面纤维断裂。关于冲击后的挠曲性能,与在相同条件下受到冲击的相应参考层压板相比,纳米微丝的存在确保了更优越的机械性能,这证明了纳米微丝在提高整个层压板的损伤耐受性方面的功效。在 10 J、20 J、30 J 和 -50°C、RT 和 100°C 下对三种配置进行了 LVI 测试。观察到的损坏模式包括分层、压痕和背面纤维裂纹。在 20 J(RT)和 10 J(100°C)条件下,对称置于外层的纤维网可限制分层。电纺纱网增强了 CFRP 在 RT 和 100°C 下的弯曲性能和冲击后的残余性能。
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来源期刊
Polymer Composites
Polymer Composites 工程技术-材料科学:复合
CiteScore
7.50
自引率
32.70%
发文量
673
审稿时长
3.1 months
期刊介绍: Polymer Composites is the engineering and scientific journal serving the fields of reinforced plastics and polymer composites including research, production, processing, and applications. PC brings you the details of developments in this rapidly expanding area of technology long before they are commercial realities.
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