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Mechanical Characterization of Viscoelastic-Plastic Soft Matter Using Spherical Indentation

B Keerthika1, Y P Cao2, D Raabe1

Max-Planck-Institut fuer Eisenforschung, Duesseldorf, Germany
Institute of Biomechancis and Medical Engineering Department of Engineering Mechanics Tsinghua University, Beijing, P. R. China

Computers, Materials & Continua 2009, 10(3), 243-258. https://doi.org/10.3970/cmc.2009.010.243

Abstract

In this study, effects of the plastic deformation and the time-dependent deformation behavior on the fundamental relations in the Oliver & Pharr method are studied by using finite element analysis based on a viscoelastic-plastic model developed for polymers. The study eventually yields an experimental protocol and using which, the instantaneous modulus of the viscoelastic-plastic materials may be reliably determined. Experiments have been performed on four polymers to verify the conclusions from the numerical analysis.

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Cite This Article

B. . Keerthika, Y. P. . Cao and D. . Raabe, "Mechanical characterization of viscoelastic-plastic soft matter using spherical indentation," Computers, Materials & Continua, vol. 10, no.3, pp. 243–258, 2009.



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