Figure 11.

The energy absorption of the foam under the different strain rates: (a) the diagram of the energy absorption as a function of the compression ratio, the red line (E_q) represents the energy absorption of the foam in the hydraulic test, the blue line (E_d) represents the energy absorption of the foam in the drop weight test, and the orange line (E_s) represents the energy absorption of foam in the shock tube test; (b) the energy absorptions of the foam under the different strain rates, here, the energy absorption value was greatly affected by velocity under the shock mode.