Determination of the properties of viscoelastic materials using spherical nanoindentation

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• 作者：Elena Martynova
• 关键词：Relaxation function ; Spherical indenter ; Viscoelasticity ; Creep compliance
• 刊名：Mechanics of Time-Dependent Materials
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：20
• 期：1
• 页码：85-93
• 全文大小：844 KB
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• 作者单位：Elena Martynova (1)
  
  1. Department of Mechanics and Mathematics, Moscow State University, Leninskie Gory, 1, Moscow, 119991, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Mechanics
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer Netherlands
• ISSN：1573-2738

文摘

The article is devoted to determining the properties of linearly viscoelastic isotropic materials from the experiment on the introduction of a spherical indenter at a constant-rate displacement in a viscoelastic sample. The results are based on the Lee–Radok (J. Appl. Mech. 27:438–444, 1960) solution of the viscoelastic contact problem. An exact formula is obtained for calculation of the relaxation function using indentation load–displacement data. To illustrate the application of this formula, it is used to find the relaxation function of polymethyl methacrylate (PMMA). The relaxation function found in the article is compared with data measured in a conventional test to evaluate the suitability of the proposed method.