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Determination of viscoelastic material parameters by step-loading nanoindentation

S N Dub1 and M L Trunov2

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Methodical aspects of studies of the time-dependent mechanical properties of materials by step-loading nanoindentation using a Berkovich indenter have been considered. The possibility is shown to determine the viscosity and relaxation time of viscoelastic materials from experiments on step-loading nanoindentation. The potentialities of step-loading nanoindentation have been demonstrated by the example of the photoplastic effect in chalcogenide glasses.


PACS

62.40.+i Anelasticity, internal friction, stress relaxation, and mechanical resonances

81.40.Np Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure

62.20.Qp Friction, tribology, and hardness

61.43.Fs Glasses

81.40.Jj Elasticity and anelasticity, stress-strain relations

62.20.F- Deformation and plasticity

Subjects

Condensed matter: structural, mechanical & thermal

Dates

Issue 7 (7 April 2008)

Received 6 August 2007, in final form 21 October 2007

Published 12 March 2008



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