Effect of projectile nose on high‐velocity impact behavior of fiber metal laminates

Abstract

Fiber metal laminates (FMLs) are a class of hybrid materials consisting of several thin metal layers bonded by layers of composite material. In the present study, the ballistic limit, absorbed energy, specific perforation energy and failure mechanism of FML 2/1 (Al/GFRE/Al) and FML 3/2 (Al/GFRE/Al/GFRE/ Al) are numerically and experimentally studied under the high-velocity impact loading using a single-stage light gas gun. In addition, the ballistic behavior of FML 2/1 and FML 3/2 is investigated using three different projectile nose geometries. Numerical simulation of the ballistic tests was performed to determine the residual velocity and the FML panel failure mechanism by using AUTODYN. The results indicated that the highest ballistic limit for FML 2/1 and FML 3/2 was obtained for the conical nosed projectile and the ballistic limit of FML 3/2 was 75.63% higher than FML 2/1. Although the FML 3/2 thickness is ~67% higher than FML 2/1, the specific perforation energy of FML 3/2 is improved by 72.51%, 55.26%, and 89.22% compared to FML 2/1 for blunt, hemispherical, and conical nosed projectiles, respectively.

Quasi‐static fracture characterization of fiber metal laminate with crack resistance curve based on δ5

“…[1] From another point of view, FML can also be reinforcement for composite structures, as it can provide more resistance to impact load and moisture. [2][3][4][5] Thus, FML is thought to be one of the most promising damage tolerance materials in aircraft and other engineering industries. Among the factors associated with the damage tolerance, residual strength is the one of utmost importance.…”

Study on the failure mechanism of 1060‐H112 aluminum alloy‐carbon/glass fiber laminate

“…So far, many scholars have done many studies on failure mechanisms of composite materials. [12][13][14] Meanwhile, researchers have conducted GLARE and CARALL quasi-static mechanics tests [15][16][17][18][19][20] to study the quasi-static bending behavior of FMLs with respect to the bonding interface between metal and composite layer, adhesive layer, fiber direction, stacking sequence, and fiber type. Sadighi et al [21] have studied the effect of fiber orientation on the bending properties of GLARE.…”

Dynamic Deformation and Perforation of Ellipsoidal Thin Shell Impacted by Flat-Nose Projectile

“…Most corresponding investigations have been performed based on numerical simulation and experiments [2][3][4], and it still has been frequently investigated in recent years [5].…”