Effect of fiber architecture on the impact resistance of composite panels subjected to metallic projectile

Experiments using a single-stage gas gun were conducted to evaluate the resistance of three types of composite panels to high-velocity impacts from metallic projectiles: panels reinforced with unidirectional tape or formed from plain-woven fabric or two-dimensionally braided fabric. The critical penetration velocity, deformation, and failure morphologies were examined by virtue of high-speed photography, 3D digital image correlation technology and non-destructive testing methods. In addition, a normalized quantity was introduced to assess the energy absorption capacity of the panels. Laminates stacked by angle-ply unidirectional tapes contained impacts at higher velocities than other panels, and the energy absorption capacities of the plain-woven and braided composite panels are comparable. The results provide insights into the impact failure behavior of composite panels and can aid in the selection of materials for aeroengine casings.

Automated summary

Experiments using a single-stage gas gun evaluated the resistance of three types of composite panels to high-velocity impacts, examined critical penetration velocity, deformation, and failure morphologies using various technologies, and introduced a normalized quantity to assess energy absorption capacity. The results provide insights into impact failure behavior of composite panels and can be helpful in material selection for aeroengine casings.