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

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63μm.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;