Elango Indhumathi, Arumugam V, Dhakal Hom N
Department of Aerospace Engineering, Anna University, MIT Campus, Chennai, India.
Portsmouth Centre for Advanced Materials and Manufacturing (PCAMM), School of Electrical and Mechanical Engineering, University of Portsmouth, PO1 3DJ, Hampshire, United Kingdom.
Heliyon. 2024 Oct 9;10(20):e38842. doi: 10.1016/j.heliyon.2024.e38842. eCollection 2024 Oct 30.
Current research uses a novel recycled milled carbon (rmCF), recycled milled Kevlar (rmKF), and innovative Hybrid fillers (rmHF) of both to increase glass/epoxy composite laminate delamination resistance. This study examines how crack propagation and fibre orientation affect laminated composite delamination fracture toughness. Recycled milled Fillers in the interlayer increase stiffness, delamination resistance, and fracture toughness by increasing the energy needed to crack the interlaminar domain. Here, Mode I, Mode II, and Mixed Mode (I/II) with = 25 %, 50 % and 75 % were studied for four different Interface fibre orientations. It appears [0/90/0] increased delamination toughness. Adding the novel recycled milled fillers improved delamination resistance. Among the three fillers, rmCF increased fracture toughness by 271 % and rmHF and rmKF composites had 220 % and 182 % higher fracture toughness. The synergy compensated for Kevlar's lower fracture toughness in the hybrid (rmHF). SEM analysis of fractured surfaces revealed crack deflection, individual debonding, and filler/matrix interlocking, all of which increase fracture toughness on different levels.
当前的研究使用了一种新型的再生研磨碳（rmCF）、再生研磨凯夫拉尔纤维（rmKF）以及两者的创新性混合填料（rmHF）来提高玻璃/环氧复合层压板的抗分层性能。本研究考察了裂纹扩展和纤维取向如何影响层压复合材料的分层断裂韧性。层间的再生研磨填料通过增加使层间区域开裂所需的能量来提高刚度、抗分层性能和断裂韧性。在此，针对四种不同的界面纤维取向研究了模式I、模式II以及混合模式（I/II，其中 分别为25%、50%和75%）。结果显示，[0/90/0]结构提高了分层韧性。添加新型再生研磨填料改善了抗分层性能。在这三种填料中，rmCF使断裂韧性提高了271%，rmHF和rmKF复合材料的断裂韧性分别高出220%和182%。这种协同作用弥补了混合材料（rmHF）中凯夫拉尔纤维较低的断裂韧性。对断裂表面的扫描电子显微镜分析揭示了裂纹偏转、单个脱粘以及填料/基体互锁现象，所有这些都在不同程度上提高了断裂韧性。
