The Correlation of LVI Parameters and CAI Behaviour in Aluminium-Based FML

An experimental analysis of mechanical behaviour for aluminium-based fibre metal laminates under compression after impact was conducted. Damage initiation and propagation were evaluated for critical state and force thresholds. Parametrization of laminates was done to compare their damage tolerance. Relatively low-energy impact had a marginal effect on fibre metal laminates compressive strength. Aluminium-glass laminate was more damage-resistant than one reinforced with carbon fibres (6% vs. 17% of compressive strength loss); however, aluminium-carbon laminate presented greater energy dissipation ability (around 30%). Significant damage propagation before the critical load was found (up to 100 times the initial damaged area). Damage propagation for assumed load thresholds was minor in comparison to the initial damage size. Metal plastic strain and delaminations are dominant failure modes for compression after impact.

Automated summary

An experimental analysis was conducted to evaluate the mechanical behavior of aluminium-based fibre metal laminates under compression after impact. Damage initiation and propagation were assessed for critical state and force thresholds. Parametrization of laminates was done to compare their damage tolerance. Results showed that relatively low-energy impact had a marginal effect on the compressive strength of fibre metal laminates. The aluminium-glass laminate exhibited higher damage resistance while the aluminium-carbon laminate had greater energy dissipation ability. Significant damage propagation before the critical load was observed.