The present study is focused on investigating the effect of the micro-mechanical properties of the natural fiber- (pineapple leaf fiber) reinforced polymeric composites by the addition of pineapple leaf micro-particulates. For the investigation, a two-step approach has been used. In the first step, finite element method-based analysis has been used to characterize the tensile and shear properties of the pineapple leaf fiber-reinforced polymeric composites (FRP) and pineapple paticulate-reinforced polymeric composites (PRC), and the adopted finite element method-based analysis has been validated through the experimental approach. In the second step, the validated finite element method-based analysis has been used to characterize the micro-mechanical properties of the hybrid fiber-reinforced polymeric composites (HFRP) fabricated using the pineapple leaf micro-particle embedded epoxy as a matrix material and the pineapple leaf fiber has been used as reinforcing material. It has been observed through the analysis that the micro-mechanical properties of HFRP were superior to that of FRP. There has been a 10.16% increment in Young’s modulus in the longitudinal direction and a 26.36% increment in Young’s modulus in the transverse direction for HFRP over FRP. Further, a 9.91% increment for in-plane shear modulus and 26.17% increment in outer-plane shear modulus have been observed for HFRP in comparison to FRP. These results suggest that pineapple leaf particulates are good reinforcing materials to enhance the transverse direction and outer plane micro-mechanical properties of the fiber-reinforced composite.

本研究的重点是通过添加菠萝叶微粒来研究天然纤维（菠萝叶纤维）增强的聚合物复合材料的微机械性能的影响。为了进行调查，使用了两步法。第一步，基于有限元方法的分析用于表征菠萝叶纤维增强聚合物复合材料（FRP）和菠萝状颗粒增强聚合物复合材料（PRC）的拉伸和剪切性能，并采用有限元方法基于方法的分析已通过实验方法进行了验证。第二步 基于验证的基于有限元方法的分析已用于表征以菠萝叶微粒嵌入环氧树脂为基质材料制造的混杂纤维增强聚合物复合材料（HFRP）的微机械性能，并且菠萝叶纤维用作增强材料。通过分析观察到，HFRP的微机械性能优于FRP。相对于FRP，HFRP在纵向上的杨氏模量增加了10.16％，在横向上的杨氏模量增加了26.36％。此外，与FRP相比，HFRP的平面内剪切模量增加了9.91％，外平面剪切模量增加了26.17％。