Effect of Fiber Loading and Orientation on Mechanical and Thermal Properties of Jute-Polyester Laminated Composite

ABSTRACT

The effects of fiber orientation and volume fraction on the mechanical and thermal properties of laminated jute reinforced polyester composite are investigated. The composite sheets of thickness 4.0 mm are fabricated by hand lay-up method using three laminated stacks of jute fibers and four different orientations (0°/90°/0°, 90°/0°/90°, 45°/0°/-45° and −45°/90°/45°). For each fiber orientation, two-volume fractions of 20% and 30% are used. The mechanical properties such as tensile, flexural, impact strength, modulus of toughness and elasticity, and hardness of the fabricated composites are evaluated by testing as per ASTM standard. The thermal conductivity of the composite sheets is determined by Lee’s method. It is found that the mechanical strength, surface hardness and thermal conductivity of the laminated jute reinforced polyester composite are increased with fiber volume fraction and varied with fiber orientation. The tensile strength, energy absorption and load-bearing capacity are found the highest for 45°/0°/-45°, second-highest for 0°/90°/0° and the lowest for −45°/90°/45° fiber orientation. The flexural strength is found the highest for 0°/90°/0° and the second-highest for 45°/0°/-45° fiber orientation. The method and procedure of this research work can be used to fabricating moderate size jute reinforced polyester composites with elevated in-plane strength in both longitudinal and lateral directions.

摘要

研究了纤维取向和体积分数对黄麻纤维增强聚酯复合材料力学性能和热性能的影响. 采用三层黄麻纤维层压叠层法和四种不同的取向（0°/90°/0°, 90°/0°/90°, 45°/0°/-45°和–45°/90°/45°）采用手工铺层法制造出厚度为4.0 mm的复合板. 对于每个纤维取向，使用20%和30%两种体积分数. 根据ASTM标准，通过试验对复合材料的拉伸、弯曲、冲击强度、韧弹性模量、硬度等力学性能进行了评价. 用Lee方法测定了复合材料薄板的导热系数. 结果表明，复合材料的机械强度、表面硬度和导热系数随纤维体积分数的增加而增加，并随纤维取向的变化而变化. 拉伸强度、能量吸收和承载能力以45°/0°/-45°最高，0°/90°/0°次之，–45°/90°/45°方向最低. 弯曲强度在0°/90°/0°时最高，其次是45°/0°/-45°纤维取向. 本研究的方法和程序可用于制备中等尺寸的黄麻增强聚酯复合材料，其纵向和横向的面内强度都有所提高.

KEYWORDS:

• Jute fiber
• composite
• laminated composite
• natural fiber
• fiber orientation
• polyester matrix

关键词:

• 黄麻纤维
• 复合材料
• 层压复合材料
• 天然纤维
• 纤维取向
• 聚酯基体.

Acknowledgments

The authors want to thank for supporting this work in all respect from the Department of Mechanical and Production Engineering (MPE) of Ahsanullah University of Science and Technology (AUST), Tejgaon Industrial Area, Dhaka, Bangladesh; and Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.