Damage and energy absorption characteristics of glass fiber reinforced titanium laminates to low-velocity impact

Abstract

The low-velocity impact resistance of fiber metal laminates (FMLs) is investigated. FMLs with titanium alloy Ti-6Al-4V sheets and glass fiber/epoxy layers are fabricated using the hand layup technique, exhibiting the same total metal layer thickness. A drop tower is used to produce a low-velocity impact on the FMLs. FML with outermost metallic layers exhibits comparatively higher lateral spreading and interlayer delamination opening contrary to FML with more metallic layers. This is also observed in high-velocity impact. The low-velocity impact resistance of titanium-based FMLs seems higher than aluminum-based FMLs. This is also noticed in high-velocity impact for former and latter FMLs.

Keywords:

• Fiber metal laminates
• titanium-based FMLs
• low-velocity impact
• delamination
• interlayer opening
• energy absorption

Data availability statement

The raw/processed data that support the findings of this study cannot be shared at this time as the data also form part of an ongoing study.

Disclosure statement

The authors confirm that they have no relevant financial or non-financial competing interests to report.