Semnan University Press Mechanics of Advanced Composite Structures 2423-4826 13 1 2026 04 01 Performance Evaluation of Epoxy-Based Natural Composites Reinforced with Flax and Flax-Ramie Fiber 13 22 9660 10.22075/macs.2025.35217.1723 EN Nidhi Bangalore Chandrashekar Department of Mechanical Engineering, RV College of Engineering, Bengaluru, 560059, India Ramesh Suryanarayana Sharma Department of Mechanical Engineering, RV College of Engineering, Bengaluru, 560059, India Journal Article 2024 09 04 Growing environmental concerns and regulatory pressure have necessitated the requirement for natural fiber-based composites for various applications. . This paper focuses on the performance evaluation of epoxy reinforced with Flax and flax-ramie fiber hybrid composites. The laminates were developed through the hand layup technique with Flax and Ramie fibers using epoxy resin. The prepared samples were further analyzed under various dynamic and static conditions, including Fast Fourier Transform (FFT) analysis, impact testing, water absorption testing, and density measurement. The flax-ramie hybrid composite shows dynamic and static properties, including better vibration control, impact resistance, and lower moisture absorption, compared to the flax fiber composite. With a density of 1.17 g/cm³, the absorbs more energy (10.47 J) and withstands higher impact forces (2.08 N). These characteristics make the hybrid composite more suitable for impact-prone and water-sensitive applications.               https://macs.semnan.ac.ir/article_9660_e8054dd75bfbaddf273dc35d58aeedef.pdf