Numerical Study on the Energy Absorption and Damage Characteristics of Aluminum Alloy Carbon/Glass Fiber Laminates under Different Impact Velocities

Abstract

To study the dynamic response of metal fiber laminates subjected to the same energy and different velocities, a finite element model of aluminum alloy-carbon/glass fiber laminates was constructed to analyze the impact dynamic response and discuss the characteristics of interlayer damage. The results show that under the same impact kinetic energy conditions, the higher the initial velocity of the bullet is, the faster the velocity decays during the impact, and the more kinetic energy is consumed overall. On the whole, the shape of the failure area of the metal layer is similar to the shape of the bullet plane, and the failure area of the fiber layer will extend along the direction of the fiber layer. Whether it is a carbon fiber layer or a glass fiber layer, the tensile failure area is larger than the compression failure area. The fiber tensile/compression failure area is the largest, followed by the tensile/compression delamination failure area, and the matrix tensile/compression failure area is the smallest. As the bullet velocity increases, the failure area of the glass fiber layer in different forms becomes smaller, while the failure area of the carbon fiber layer in different forms does not change significantly.