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On the Measurement of two Independent Viscoelastic Functions with Instrumented Indentation Tests
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).ORCID iD: 0000-0001-6232-8819
2018 (English)In: Experimental mechanics, ISSN 0014-4851, E-ISSN 1741-2765, Vol. 58, no 2, p. 301-314Article in journal (Refereed) Published
Abstract [en]

In the present paper, a methodology for complete characterization of linear isotropic viscoelastic material with spherical instrumented indentation test is proposed. The developed method allows for measuring two independent viscoelastic functions, shear relaxation modulus and time-dependent Poisson's ratio, from the indentation test data obtained at non-decreasing loading, but otherwise arbitrary. Finite element modelling (FEM) is relied upon for validating the proposed methodology and for quantifying the influence of experimental variables on the measurements accuracy. Spherical indentation experiments are performed on several viscoelastic materials: polyoxymethylene, bitumen and bitumen-filler mastics. The viscoelastic material functions obtained with the indentation tests are compared with the corresponding results from the standard mechanical tests. Numerical and experimental results presented indicate that the methodology proposed allows mitigating the machine compliance and loading rate effects on the accuracy of the viscoelastic indentation tests.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 58, no 2, p. 301-314
Keywords [en]
Indentation, Viscoelasticity, Mechanics of materials, FEM, Bitumen, Bitumen-filler mastics
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-222406DOI: 10.1007/s11340-017-0342-7ISI: 000423584800008Scopus ID: 2-s2.0-85030833837OAI: oai:DiVA.org:kth-222406DiVA, id: diva2:1186311
Note

QC 20180228

Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-05-24Bibliographically approved

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Larsson, Per-Lennart

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