Numerical and Experimental Evaluations of a Glass-Epoxy Composite Material Under High Velocity Oblique Impacts

Abstract

Composite materials are widely used in both the defense and commercial sectors for various applications. Many of these applications present the possibility of the composite material being subjected to high-velocity impacts, where the strain rates can be on the order of 106 s-1 or more and the pressures are often in the tens of GPa. The work presented in this paper expands upon previous work for the same materials where the impacts were normal to the composite material [1] by considering the non-ideal condition of oblique impacts that are more likely to occur in regular use.

Effect of Superficial Scratch Damage on Tension Properties of Carbon/Epoxy Plain Weave Laminates

“…ese defects will inevitably affect the structural integrity and structural load-bearing capability of the materials [1][2][3][4]. Several studies of damage to composites have focused on the response and performance of composite structures that have been subjected to low-or high-velocity impact [5][6][7][8].…”

Experimental and numerical study of the behavior of a Glass Fiber Reinforced Plastic plate under oblique impact

“…There are a number of works in which a numericalexperimental assessment of the influence of oblique impacts. [20][21][22] In their work, Lopez-Puente 20 and Ansari 21 used fairly simple macro-level models to simulate the impact. As is known, such models do not allow predicting the damage zone of the composite with sufficient accuracy.…”

“…After that, only numerical studies were carried out at different angles. In the article 22 Key et al studied the behavior of fiberglass at high-velocities oblique impacts. The developed numerical model makes it possible to predict the residual strength of the material quite well only at small angles of inclination.…”

“…After that, only numerical studies were carried out at different angles. In the article 22 Key et al. studied the behavior of fiberglass at high-velocities oblique impacts.…”