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arXiv 1609.05671math.AP
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系数非一致有界的向量值函数的等强制非线性能量的均匀化

Homogenization of equi-coercive nonlinear energies defined on vector-valued functions, with non-uniformly bounded coefficients

Marc Briane, J Casado-Díaz, M Luna-Laynez, A Pallares-Martín

摘要:

本文研究了$W_)^{1,p}(Ω)^M$中定义在向量值函数上的非线性泛函的等强制序列$\{\mathcal{F}_n\}$的渐近性,其中$p>1$,$M\ge1$,$Ω$是$\mathbb{R}^N$,$N\ge2$的有界开集.泛函$\{\mathcal{F}_n\}$的强局部能量密度$F_n({\cdot}, Du)$满足关于第二个变量的Lipschitz条件,该第二个变量由仅在某个适当的空间$L^r(Ω)$中有界的正序列$\{a_n\}$控制。证明了序列$\{\mathcal{F}_n\}$ $Γ$ -对于$L^p(Ω)^M$的强拓扑收敛于一个泛函$\mathcal{F}$,它对于充分正则的函数$u$具有强局部密度$F({\cdot}, Du)$.这个紧性结果扩展了以前的结果的主题,这是基于最大原理参数的非线性标量的情况下,或适应div-curl引理的线性情况下。在这里,矢量字符和非线性的问题需要一个新的方法的基础上仔细分析的渐近极小与功能$\mathcal{F}_n$。施加到能量密度$F_n({\cdot}, Du)$的条件的相关性,说明了几个例子,包括一些经典的超弹性能量。

英文摘要:

The present paper deals with the asymptotic behavior of equi-coercive sequences $\{\mathcal{F}_n\}$ of nonlinear functionals defined over vector-valued functions in $W_)^{1,p}(Ω)^M$ , where $p>1$, $M\ge1$, and $Ω$ is a bounded open set of $\mathbb{R}^N$, $N\ge2$. The strongly local energy density $F_n({\cdot}, Du)$ of the functional $\{\mathcal{F}_n\}$ satisfies a Lipschitz condition with respect to the second variable, which is controlled by a positive sequence $\{a_n\}$ which is only bounded in some suitable space $L^r(Ω)$. We prove that the sequence $\{\mathcal{F}_n\}$ $Γ$-converges for the strong topology of $L^p(Ω)^M$ to a functional $\mathcal{F}$ which has a strongly local density $F({\cdot}, Du)$ for sufficiently regular functions $u$. This compactness result extends former results on the topic, which are based either on maximum principle arguments in the nonlinear scalar case, or adapted div-curl lemmas in the linear case. Here, the vectorial character and the nonlinearity of the problem need a new approach based on a careful analysis of the asymptotic minimizers associated with the functional $\mathcal{F}_n$. The relevance of the conditions which are imposed to the energy density $F_n({\cdot}, Du)$, is illustrated by several examples including some classical hyper-elastic energies.

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