Compare the Young's modulus E∗ of two open-cell foams. Which Young's modulus is higher? Recall that C1=1.
1. polystyrene: (Es∼3.5GPa), ρ∗/ρs=0.3
2. Al 7075-T651: (Es∼72GPa), ρ∗/ρs=0.1
1. polystyrene: (Es∼3.5GPa), ρ∗/ρs=0.3
2. Al 7075-T651: (Es∼72GPa), ρ∗/ρs=0.1