Mechanical Behavior of Composite Materials Under Dynamic Loading Conditions

This article explores the mechanical behavior of composite materials under dynamic loading conditions such as impacts, vibrations, and shocks, which are common in high-energy applications. Composite materials, made of reinforcing fibers embedded in a polymer matrix, offer superior strength-to-weight ratios and customizable properties, making them ideal for aerospace, automotive, and defense industries. However, their response to rapid, high-intensity loads involves complex damage and energy dissipation mechanisms that require thorough investigation. The study integrates extensive experimental testing and numerical modeling to examine how key factors—fiber orientation, matrix properties, and laminate stacking sequences—affect the dynamic performance of composites. Experimental work includes low- and high-velocity impact tests, vibration and fatigue assessments, and advanced damage characterization techniques such as ultrasonic scanning and computed tomography. These methods provide detailed insights into damage initiation and progression mechanisms like matrix cracking, fiber fracture, delamination, and fiber-matrix interface failure, as well as measurements of energy absorption and residual strength after impact. Numerical simulations using finite element analysis and micromechanical modeling complement experiments by predicting stress fields, damage evolution, and energy dissipation under transient loads. These models incorporate strain-rate-dependent material behavior and multi-mode failure criteria, enabling parametric studies that optimize composite designs for enhanced toughness and energy absorption. The findings highlight the critical influence of composite architecture and material properties on their ability to absorb energy and resist dynamic damage. This research supports the development of advanced composite materials tailored for high-performance, safety-critical applications, ultimately contributing to lighter, stronger, and more resilient structures capable of withstanding demanding dynamic environments.

کلیدواژه ها:

Dynamic loading ، Composite materials ، Energy dissipation ، Fiber orientation