Extremal hinged lattices do not obey the theory of elasticity

Extremal hinged lattices do not obey the theory of elasticity
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极值铰接晶格不遵守弹性理论

DOI:
10.1007/s00033-021-01664-x
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发表时间:
2022
期刊:
Zeitschrift für angewandte Mathematik und Physik
影响因子:
--
通讯作者:
Lakes, R. S.
Lakes, R. S.
中科院分区:
--
文献类型:
--
作者:
Lakes, R. S.

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达到泊松比极值的铰接晶格一般不服从弹性理论。泊松比为-1的铰链结构很容易拉伸或体积变形,但它们抵抗弯曲,这与弹性理论的预测相反。它们的行为对应于具有发散特征长度的Cosserat固体。达到最大泊松比的铰接结构相对于流体静力拉伸是刚性的,易于剪切或拉伸,但相对于流体静力压缩是不稳定的。
Hinged lattices that attain extremal values of Poisson’s ratio do not in general obey the theory of elasticity. Hinged structures that attain a Poisson’s ratio of − 1 are easy to stretch or deform volumetrically but they resist bending, in contrast to the predictions of elasticity theory. Their behavior corresponds to that of a Cosserat solid with divergent characteristic length. Hinged structures that attain a maximum Poisson’s ratio are rigid with respect to hydrostatic tension, are easy to shear or to stretch but are unstable with respect to hydrostatic compression.
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