Natural Frequency Analysis of Polymer Composites
Abstract
Polymer composite materials are increasingly utilized in vibration-sensitive engineering applications due to their high strength-to-weight ratio, design flexibility, and tailorable dynamic properties. Among these properties, natural frequency plays a crucial role in determining structural stability, resonance avoidance, and dynamic performance. This review presents a comprehensive synthesis of recent research on the natural frequency characteristics of polymer composite structures, with emphasis on material properties, structural configurations, boundary conditions, damage effects, environmental influences, and advanced reinforcement strategies. A systematic literature review methodology was adopted, and twenty-seven peer-reviewed research articles were analyzed using analytical, numerical, and experimental perspectives. The review highlights key trends indicating that fiber type, volume fraction, hybridization, and smart material integration significantly influence natural frequency behavior. Damage and environmental exposure were found to reduce natural frequency due to stiffness degradation, while advanced fillers and smart composites enable effective frequency tuning and active vibration control. Despite extensive research, gaps remain in multi-physics integration, long-term durability assessment, and large-scale experimental validation. This review consolidates existing knowledge, identifies research gaps, and provides direction for future investigations aimed at dynamically optimized polymer composite structures in machine dynamics applications.