engleski

Compressive Behaviour of Closed-Cell Aluminium Foam at Different Strain Rates

Closed-cell aluminium foams were fabricated and characterised at different strain rates. Quasi-static and high strain rate experimental compression testing was performed using a universal servo-hydraulic testing machine and powder gun. The experimental results show a large influence of strain rate hardening on mechanical properties, which contributes to significant quasi-linear enhancement of energy absorption capabilities at high strain rates. The results of experimental testing were further used for the determination of critical deformation velocities and validation of the proposed computational model. A simple computational model with homogenised crushable foam material model shows good correlation between the experimental and computational results at analysed strain rates. The computational model offers excient (simple, fast and accurate) analysis ofhigh strain rate deformation behaviour of a closed-cell aluminium foam at different loading velocities.

cellular materials ; closed-cell aluminium foam ; quasi-static ; high strain rate ; powder gun ; computational simulations ; crushable foam

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