Viscoelasticity of PMMA Studied by Nanoindentation

The paper focuses on microscale viscoelastic properties of Poly-methyl methacrylate (PMMA) measured by a nanoindenter.PMMA serves as a reference homogeneous material suitable for evaluating of theoretical and experimental aspects of the nanoindentation process and computational methods.Viscoelastic constants are calculated with two analytical approaches and compared.Sensitivity to key experimental parameters including maximum load and loading time is assessed.