Poroelastic relaxation indentation of thin layers of gels

被引：54

作者：

Hu, Yuhang ^{[1
]}

Chan, Edwin P. ^{[2
]}

Vlassak, Joost J. ^{[1
]}

Suo, Zhigang ^{[1
]}

机构：

[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] NIST, Div Polymers, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2011年 / 110卷 / 08期

基金：

美国国家科学基金会;

关键词：

ELASTIC PROPERTIES; CONTACT MECHANICS; DRUG-DELIVERY; HYDROGEL; SUBSTRATE; NANOINDENTATION; HARDNESS; MODULUS; FILMS;

D O I：

10.1063/1.3647758

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We develop a method of poroelastic relaxation indentation (PRI) to characterize thin layers of gels. The solution to the time-dependent boundary-value problem is obtained in a remarkably simple form, so that the force-relaxation curve obtained by indenting a gel readily determines all the poroelastic constants of the gel-the shear modulus, Poisson's ratio, and the effective diffusivity. The method is demonstrated with a layer of polydimethylsiloxane immersed in heptane. (C) 2011 American Institute of Physics. [doi:10.1063/1.3647758]

引用

页数：3

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