0 2 4 6 8 10 0 5 10 15 20 Strain (%) σ (MPa) 700 s-1 1 s-1 10-3 s-1 10-5 s-1 Figure 1: Stress-strain response of Alporas foam, showing marked increase in flow stress at a strain rate of 700 s-1 versus lower strain rates. 0 5 10 15 20 25 0 5 10 15 20 Strain (%) σ (MPa) 700 s-1 1 s-1 10-3 s-1 10-5 s-1 Figure 2: Stress-strain response of Fraunhofer foam, showing transient increase in strength at a strain rate of 700 s-1.
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