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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2005.06866math.AP
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表面不连续线弹性力学能量的整表示

Integral representation for energies in linear elasticity with surface discontinuities

Vito Crismale, Manuel Friedrich, Francesco Solombrino

摘要:

本文证明了任意维空间中广义特殊有界变形函数空间($GSBD^p$)上的一类能量的整表示公式。这种类型的泛函自然地出现在具有表面不连续性的线性弹性固体的建模中,所述表面不连续性包括断裂、损伤、不同弹性相之间的表面张力或材料空隙等现象。我们的方法是基于Bouchittè等人'98中设计的全局松弛方法和$GSBD^p$(Cagnetti-Chambolle-Scardia '20)中最近的Korn型不等式。我们的一般策略还允许推广整表示结果$SBD^p$,在二维(Conti-Focardi-Iurlano '16),更高的维度,并重新审视结果的框架内的广义特殊函数的有界变差($GSBV^p$)。

英文摘要:

In this paper we prove an integral representation formula for a general class of energies defined on the space of generalized special functions of bounded deformation ($GSBD^p$) in arbitrary space dimensions. Functionals of this type naturally arise in the modeling of linear elastic solids with surface discontinuities including phenomena as fracture, damage, surface tension between different elastic phases, or material voids. Our approach is based on the global method for relaxation devised in Bouchittè et al. '98 and a recent Korn-type inequality in $GSBD^p$ (Cagnetti-Chambolle-Scardia '20). Our general strategy also allows to generalize integral representation results in $SBD^p$, obtained in dimension two (Conti-Focardi-Iurlano '16), to higher dimensions, and to revisit results in the framework of generalized special functions of bounded variation ($GSBV^p$).

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