Published online by Cambridge University Press: 11 April 2025
We study the existence and regularity of minimizers of the neo-Hookean energy in the closure of classes of deformations without cavitation. The exclusion of cavitation is imposed in the form of the divergence identities, which is equivalent to the well-known condition (INV) with  $\operatorname{Det} = \operatorname{det}$. We show that the neo-Hookean energy admits minimizers in classes of maps that are one-to-one a.e. with positive Jacobians, provided that these maps are the weak limits of sequences of maps that satisfy the divergence identities. In particular, these classes include the weak closure of diffeomorphisms and the weak closure of homeomorphisms satisfying Lusin’s condition N. Moreover, if the minimizers satisfy condition (INV), then their inverses have Sobolev regularity. This extends a recent result by Doležalová, Hencl, and Molchanova by showing that the minimizers they obtained enjoy extra regularity properties and that the existence of minimizers can still be obtained even when their coercivity assumption is relaxed.
$\operatorname{Det} = \operatorname{det}$. We show that the neo-Hookean energy admits minimizers in classes of maps that are one-to-one a.e. with positive Jacobians, provided that these maps are the weak limits of sequences of maps that satisfy the divergence identities. In particular, these classes include the weak closure of diffeomorphisms and the weak closure of homeomorphisms satisfying Lusin’s condition N. Moreover, if the minimizers satisfy condition (INV), then their inverses have Sobolev regularity. This extends a recent result by Doležalová, Hencl, and Molchanova by showing that the minimizers they obtained enjoy extra regularity properties and that the existence of minimizers can still be obtained even when their coercivity assumption is relaxed.
 $W^{1,p}$-Quasiconvexity and variational problems for multiple integrals. J. Funct. Anal. 58 (1984), 225–253.CrossRefGoogle Scholar
$W^{1,p}$-Quasiconvexity and variational problems for multiple integrals. J. Funct. Anal. 58 (1984), 225–253.CrossRefGoogle Scholar $W^{1,n-1}$ and (INV) Condition. Arch. Ration. Mech. Anal. 247 (2023), .CrossRefGoogle Scholar
$W^{1,n-1}$ and (INV) Condition. Arch. Ration. Mech. Anal. 247 (2023), .CrossRefGoogle Scholar $W^{1,n-1}$: Invertibility and lower semicontinuity of energy. ESAIM: COCV. 30 (2024), .Google Scholar
$W^{1,n-1}$: Invertibility and lower semicontinuity of energy. ESAIM: COCV. 30 (2024), .Google Scholar $H^ 1$ mappings. Manuscr. Math. 56 (1986), 1–10.CrossRefGoogle Scholar
$H^ 1$ mappings. Manuscr. Math. 56 (1986), 1–10.CrossRefGoogle Scholar