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ABSTRACT
Raising awareness of energy balance to minimize the global warming and usage of eco-friendly material has encouraged many researchers to replace synthetic materials with natural resources. Natural fibers are the alternative to man-made fibers to produce many structural parts in automotive, marine and aircraft. In the present work, sisal fiber is selected to prepare a natural composite. Sisal fiber waviness effect on the elastic properties such as longitudinal modulus (E1), transverse modulus (E2), shear modulus (G12 and G23), major (μ12) and minor Poisson’s ratio (μ21) are identified by considering different wavy patterns of half-sine waviness, full sine waviness and combination of half-sine and full sine wavy natural sisal fiber (Mixed waviness). The objective of the present work is achieved by conducting suitable experiments and numerical simulations. The influence of the waviness ratio (A/λ) on the same properties is identified with the Micromechanics approach. The influence of mixed waviness of sisal fiber on the elastic properties is identified with experimental as well as Micro and Macromechanics principles. It is observed that the waviness of the fiber has a significant effect on the composite modulus in all directions.
摘要
提高对能源平衡的认识，以尽量减少全球变暖和生态友好型材料的使用，鼓励了许多研究人员用自然资源取代合成材料. 天然纤维是人造纤维的替代品，用于生产汽车、船舶和飞机中的许多结构部件. 在目前的工作中，选择西化纤维来制备天然复合材料. 通过考虑不同波浪模式的半正节，确定对弹性特性的西沙纤维波浪效应，如纵向模量 （E1）, 横向模量 （E2）、剪切模量 （G12 和 G23）、主要 （+12） 和次要泊松比（+21）， 完全正正性，半正因和全正事务波浪天然西岩纤维（混合波纹）的组合. 通过进行适当的实验和数值模拟，实现了本工作的目标。微力学方法确定了波纹比（A/+）对相同特性的影响. 确定了西化纤维混合波纹对弹性特性的影响，并确定了实验原理以及微观力学和宏观力学原理. 观察到纤维的波纹对四面八方的复合模量有显著影响.
Acknowledgments
The authors would like to thank the Siddhartha Academy Of General & Technical Education, Vijayawada, Andhra Pradesh, India, for the financial support to conduct experiments.