Hen lie Yu et al. 2026. Comparative Analysis of the Mechanical Strength of Bamboo Fiber-Reinforced Polyester Composites with Random and Unidirectional Fiber Orientations . International Journal of Energy Systems and Materials Innovation. 1, 2 (Apr. 2026), 94–99. DOI:https://doi.org/10.17524/ijesmi.v1i2.22.