Table 9.

Explicit forms of the shear moduli μ(a,k) of (4.9), $\tilde{\mu }(a)=\underset{k\to 0}{lim}\mu (a,k)$ of (4.14), and $\overline{\mu }=\underset{a\to 1}{lim}\tilde{\mu }(a)$ of (4.16), and of the Poisson’s ratios ν^(H)(a)=ν₀(a) of (3.7) and $\overline{\nu }=\underset{a\to 1}{lim}{\nu }^{(\mathrm{H})}(a)$ of (3.8) for selected isotropic hyperelastic foam models. For the shear moduli of these compressible materials, the principal stretches are given by (4.4).