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arXiv 2009.04210cond-mat.soft
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各向同性非线性弹性不可压缩固体在剪扭作用下具有线性有限应变响应的应变能函数

Strain energy function for isotropic non-linear elastic incompressible solids with linear finite strain response in shear and torsion

Robert Mangan, Michel Destrade, Giuseppe Saccomandi

摘要:

我们发现各向同性不可压缩固体的应变能函数表现出线性关系的剪切应力和剪切量之间,扭矩和扭曲量之间,当受到大的简单剪切或扭转变形。它包含了著名的新胡克模型和穆尼-里夫林模型,但也可以容纳其他项,作为主应变不变量的某些任意函数。有效地,额外的条款可以用来解释实验观察到的几个非线性效应,但没有捕捉到的新胡克和穆尼-里夫林模型,如应变硬化效应,由于限制链的延伸性。

英文摘要:

We find the strain energy function for isotropic incompressible solids exhibiting a linear relationship between shear stress and amount of shear, and between torque and amount of twist, when subject to large simple shear or torsion deformations. It is inclusive of the well-known neo-Hookean and the Mooney-Rivlin models, but also can accommodate other terms, as certain arbitrary functions of the principal strain invariants. Effectively, the extra terms can be used to account for several non-linear effects observed experimentally but not captured by the neo-Hookean and Mooney-Rivlin models, such as strain stiffening effects due to limiting chain extensibility.

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