Question

Calculate the Young's modulus and compressive strength for:

a) 5% dense aluminum regular hexagonal honeycomb, loaded in the out-of-plane direction, x3
b) 5% dense aluminum regular hexagonal honeycomb, loaded in the in-plane direction, x2
c) 5% dense aluminum open-cell foam

Assume that the aluminum honeycombs have constant wall thickness, t, and that the density, Poisson's ratio, Young's modulus and yield strength of aluminum are 2700kg/m3, 0.33, 70GPa and 200MPa, respectively.

a) 5% dense aluminum regular hexagonal honeycomb, loaded in the out-of-plane direction, x_3
E_3* (in MPa) = ?
(rho*)_3 (in MPa) = ?

b) 5% dense aluminum regular hexagonal honeycomb, loaded in the in-plane direction, x_2
E_2* (in MPa) = ?
(rho*)_2 (in MPa):

c) 5% dense aluminum open-cell foam
E* (in MPa) = ?
σ* (in MPa) = ?

Answer 1

E3*=3500