Nanoscale mechanical characterization of PMMA by AFM nanoindentation: a theoretical study on the time-dependent viscoelastic recovery

被引:11
作者
Ding, Y. H. [1 ]
Deng, X. H. [1 ]
Jiang, X. [1 ]
Zhang, P. [1 ]
Yin, J. R. [1 ]
Jiang, Y. [1 ]
机构
[1] Xiangtan Univ, Inst Rheol Mech, Xiangtan 411105, Hunan, Peoples R China
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
GLASS-TRANSITION TEMPERATURE; INDENTATION; POLYMERS; CREEP; SURFACES; BEHAVIOR; MODULUS; FILMS;
D O I
10.1007/s10853-013-7138-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Temperature-dependent indent recovery of polymethyl methacrylate is depicted by atomic force microscopy. The viscoelastic indent recovery is predicted by a numerical model based on the Boussinesq elastic theory. From the perspective of an elastic solution, viscoelastic solution for stress and displacement field is constructed through the analysis of the elasticity-viscoelasticity corresponding theory. The findings also illustrate the effect of loading condition, elastic modulus, and viscosity on the viscoelastic recovery rate.
引用
收藏
页码:3479 / 3485
页数:7
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