Characterization of viscoelastic properties of polymeric materials through nanoindentation |
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Authors: | G. M. Odegard T. S. Gates H. M. Herring |
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Affiliation: | (1) Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, 49931 Houghton, MI, USA;(2) Lockheed Martin Space Operations, MS 188E, NASA Langley Research Center, 23681 Hampton, VA, USA |
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Abstract: | Nanoindentation testing was used to determine the dynamic viscoelastic properties of eight polymer materials, which include three high-performance polymers and five densities of high-density polyethylene. It was determined that varying the harmonic frequency of nanoindentation does not have a significant effect on the measured storage and loss moduli of the polymers. Agreement was found between these nanoindentation results and data from bulk dynamic mechanical testing of the same materials. Varying the harmonic amplitude of the nanoindentation had a limited effect on the measured viscoelastic properties of the resins. However, storage and loss moduli from nanoindentation were shown to be sensitive to changes in the density of the polyethylene. |
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Keywords: | Dynamic viscoelasticity instrumented indentation nanotechnology |
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