E G Herbert et al 2008 J. Phys. D: Appl. Phys. 41 074021 doi:10.1088/0022-3727/41/7/074021
Nanoindentation and the dynamic characterization of viscoelastic solids
E G Herbert1,2, W C Oliver1,2 and G M Pharr1,3
Show affiliationsUsing a high-damping thermoplastic as a standard reference material, the purpose of this work is to compare measured values of the complex modulus as determined by dynamic nanoindentation and dynamic mechanical analysis (DMA). Experiments were performed at approximately 22 °C and seven frequencies over the range 1–50 Hz. The indentation measurements were performed using a 103 µm diameter flat punch and a newly developed test method that optimizes the accuracy and precision of the measured stiffness and damping. As determined by dynamic nanoindentation, values of the storage modulus and loss factor (tangent delta) ranged from 4.2 to 10.2 MPa, and 0.28 to 1.05, respectively. Over the range 1–25 Hz, DMA confirmed the nanoindentation results to within 15% or better. Collectively, these data and the testing methods used to generate them should help future investigators make more accurate and precise measurements of the dynamic properties of viscoelastic solids using nanoindentation.
- PACS
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62.40.+i Anelasticity, internal friction, stress relaxation, and mechanical resonances
81.40.Jj Elasticity and anelasticity, stress-strain relations
81.40.Np Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure
- Subjects
- Dates
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Issue 7 (7 April 2008)
Received 17 August 2007, in final form 17 October 2007
Published 12 March 2008
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Nanoindentation and the dynamic characterization of viscoelastic solids
E G Herbert et al 2008 J. Phys. D: Appl. Phys. 41 074021
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