The primary aim of this effort is to examine how the natural fiber orientation angle affects the lamina's engineering constants, which include the lamina level shear coupling coefficients (η_xy,x and η_xy,y), major Poisson's ratio (ν_xy), longitudinal and transverse Young's moduli (E_x and E_y), and shear modulus (G_xy). The lamina that is being studied is made of epoxy and natural fiber. Six natural fibers - alfa, flax, hemp, jute, nettle, and sisal fibers—are the subject of the investigation. For every one of the aforementioned engineering constants, the study evaluates the performance of six natural fiber epoxy lamina. This research also presents the lamina behavior for varying fiber volume fractions. The Macromechanics of lamina is used in an analytical study to conduct the examination. The analysis revealed that the lamina's engineering constants are significantly influenced by the volume percentage and orientation of the fibers. For each fiber orientation angle between 0⁰ and 90⁰, as well as for each fiber volume fraction between 0 % (totally matrix) and 100 % (completely fibers) in steps of 5 %, the study provides a thorough variations of the natural fiber epoxy lamina's engineering constants.

这项工作的主要目的是研究天然纤维取向角如何影响薄片的工程常数，其中包括薄片水平剪切耦合系数（η _xy,x和 η _xy,y ）、主泊松比（ν _xy ）、纵向和横向杨氏模量（E _x和 E _y ）和剪切模量（G _xy ）。正在研究的薄片由环氧树脂和天然纤维制成。六种天然纤维——阿尔法纤维、亚麻纤维、大麻纤维、黄麻纤维、荨麻纤维和剑麻纤维——是研究的主题。对于上述每一项工程常数，该研究评估了六种天然纤维环氧层板的性能。这项研究还提出了不同纤维体积分数的层流行为。层板宏观力学用于分析研究中进行检查。分析表明，薄片的工程常数受纤维的体积百分比和取向的显着影响。对于 0 ⁰和 90 ⁰之间的每个纤维取向角，以及 0 %（完全基质）和 100 %（完全纤维）之间的每个纤维体积分数（以 5 % 为步长），该研究提供了天然纤维的彻底变化环氧层压板的工程常数。