Nanoscale mechanical characterization of PMMA by AFM nanoindentation: a theoretical study on the time-dependent viscoelastic recovery
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.
KeywordsAtomic Force Microscopy PMMA Recovery Rate Viscoelastic Material PMMA Surface
The financial supports from the National Natural Science Foundation of China (No. 51002128), National Science Foundation for Post-doctoral Scientists of China (No. 2012M511737), Foundation for Department of Science and Technology of Hunan Province (No. 2011FJ3218) and Natural Science Foundation of Xiangtan University (No. 2011XZX19) are greatly acknowledged.
- 10.Kumar R, Narasimhan R (2004) Curr Sci 87:1088Google Scholar