Metal Foams: A Design Guide

σ max
σ pl
τ max
τ pl
σ max
σ pl
1.5
1
0.5
Compression (0.1)
Compression (0.5)
Tension (R=0.1)
Shear (R=0.1)
0
101 102 103 104 10
Cycles
(a)
5 106 107 108 1.4
1.2
1
0.8
0.6
10 2
10
Cycles
3 104 105 106 (b)
Design for fatigue with metal foams 95
(Compression)
(Tension)
(Shear)
Higher Density
Materials, ρ/ρ s ∼ 0.3
Lower Density
Materials, ρ/ρ s ∼ 0.15
10 7 10 8
Figure 8.5 (a) S–N curves for compression–compression and
tension–tension fatigue of Alporas foam (relative density 0.11). (b) S–N
curves for compression–compression fatigue of Alulight foam ⊲R D 0.1⊳.
(c) S–N curves for compression–compression and tension–tension fatigue of
Alcan foam (R D 0.1 and 0.5). (d) S–N curves for compression–compression
and tension–tension fatigue of Duocel Al-6101-T6 foam of relative
density 0.08