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arXiv 1301.7448cond-mat.soft
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不可压缩各向同性弹性力学的三阶和四阶常数

On the third- and fourth-order constants of incompressible isotropic elasticity

Michel Destrade, Ray W. Ogden

摘要:

考虑各向同性弹性固体的本构关系,其中应变能函数在应变中扩展到四阶,应力在应变中扩展到三阶。考虑到不可压缩极限,应力-应变关系可以反演,以给出应力形式的应变。为此目的,对数应变张量的使用是特别有价值的。它使所有九个四阶弹性常数在不可压缩极限的极限值,以精确和严格的评估。特别是,它解释了为什么四阶不可压缩弹性的三个常数$μ$,$\bar{A}$,和$\bar D$是相同的数量级。几个应用的结果的例子如下,包括在不可压缩固体的声弹性系数的测定和弹性波传播的非线性系数的极限值。

英文摘要:

Consider the constitutive law for an isotropic elastic solid with the strain-energy function expanded up to the fourth order in the strain, and the stress up to the third order in the strain. The stress-strain relation can then be inverted to give the strain in terms of the stress with a view to considering the incompressible limit. For this purpose, use of the logarithmic strain tensor is of particular value. It enables the limiting values of all nine fourth-order elastic constants in the incompressible limit to be evaluated precisely and rigorously. In particular, it is explained why the three constants of fourth-order incompressible elasticity $μ$, $\bar{A}$, and $\bar D$ are of the same order of magnitude. Several examples of application of the results follow, including determination of the acoustoelastic coefficients in incompressible solids and the limiting values of the coefficients of nonlinearity for elastic wave propagation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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