W1,p-quasiconvexity and variational problems for multiple integrals
W1,p-quasiconvexity and variational problems for multiple integrals
复制标题
DOI:
10.1016/0022-1236(84)90041-7
复制
发表时间:
1984-10
影响因子:
1.7
通讯作者:
J. Ball;F. Murat
中科院分区:
文献类型:
--
作者:
J. Ball;F. Murat
Variational problems for the multiple integral I Ω (u)=∝ Ω g (▽ u (x)) dx, where Ω⊂ R m and u: Ω→ R n are studied. A new condition on g, called W 1, p-quasiconvexity is introduced which generalizes in a natural way the quasiconvexity condition of CB Morrey, it being shown in particular to be necessary for sequential weak lower semicontinuity of I Ω in W 1, p (Ω; R n) and for the existence of minimizers for certain related integrals. Counterexamples are given concerning the weak continuity properties of Jacobians in W 1, p (Ω; R n), p⩽ n= m. An existence theorem for nonlinear elastostatics is proved under optimal growth hypotheses.