Physical and Mechanical Behavior of Ramie and Glass Fiber Reinforced Epoxy Resin-Based Hybrid Composites

ABSTRACT

In this study, the compression molding technique was used to fabricate hybrid composites using different wt.% of the glass and ramie fibers in different stacking sequences. The physical (density, water absorption, and wear resistance) and mechanical (tensile strength, hardness, and impact strength) and morphology studies were performed for the glass and ramie fibers and the effect of stacking sequencing was studied. A technique for order of preference by similarity to the ideal solution model was used to determine the optimal reinforcement composition in the hybrid composites. The stacking sequence played a crucial role in the physical and mechanical characteristics of the hybrid composites. The GRG (stacking sequence: Glass (4 wt.%)-Ramie (4 wt.%)-Glass(4 wt.%)) hybrid composite showed optimal characteristics; tensile strength: 114 MPa, hardness: 41 HV, impact energy: 3.5 J m⁻¹, void content: 1.09% and wear: 63 μm. However, if glass fibers were sandwiched between the ramie fiber layer, the composite showed lower physical and mechanical characteristics; tensile strength: 72 MPa, hardness: 28 HV, impact energy: 3 J m⁻¹. The glass fiber reinforced composites (GG and GGG) exhibited better water absorption characteristics. The RRR composite’s impact strength was comparable with the GGG composites due to the stacking of the composites. Moreover, the glass fiber composites stacking (RR to RGR) exhibited lower tensile strength than ramie fiber composites stacking (GG to GRG). The microstructural analysis of the fractured composite surface revealed voids, de-lamination, interfacial bonding of the fibers with the matrix, fiber pull-out, and matrix distribution.

摘要

在本研究中，采用模压技术，使用不同重量%的玻璃纤维和苎麻纤维以不同的堆叠顺序制备混合复合材料. 对玻璃纤维和苎麻纤维进行了物理（密度、吸水性和耐磨性）、机械（拉伸强度、硬度和冲击强度）和形态研究，并研究了堆叠顺序的影响. 使用与理想溶液模型相似的优先顺序技术来确定混合复合材料中的最佳补强成分. 堆叠顺序对杂化复合材料的物理和力学特性起着至关重要的作用. GRG（堆叠顺序: 玻璃（4 wt.%）-苎麻（4 wt.-玻璃（4 wt%））杂化复合材料显示出最佳特性; 抗拉强度: 114MPa，硬度41HV，冲击能3.5Jm-1，空隙率1.09%，磨损63 μm. 然而，如果玻璃纤维夹在苎麻纤维层之间，复合材料的物理力学性能较低; 抗拉强度: 72MPa，硬度: 28HV，冲击能量: 3Jm-1. 玻璃纤维增强复合材料（GG和GGG）具有较好的吸水性能. 由于复合材料的堆叠，RRR复合材料的冲击强度与GGG复合材料相当. 此外，玻璃纤维复合材料堆叠（RR至RGR）表现出比苎麻纤维复合材料层叠（GG至GRG）更低的拉伸强度. 断裂复合材料表面的微观结构分析揭示了空隙、分层、纤维与基体的界面结合、纤维拔出和基体分布.

KEYWORDS:

• Hybrid composites
• natural fibers
• ramie fibers
• epoxy resin

关键词:

• 混杂复合材料
• 天然纤维
• 苎麻纤维
• 环氧树脂
• 玻璃纤维

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/15440478.2023.2234080