KOTNIK, Urban ;OSELI, Alen ;KUTIN, Jože ;HALILOVIČ, Miroslav ;SLEMENIK PERŠE, Lidija .
Evaluation of Measurement Uncertainty in Creep-Based Determination of Viscoelastic Material Functions of Polypropylene.
Articles in Press, [S.l.], v. 0, n.0, p. , january 2026.
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/evaluation-of-measurement-uncertainty-in-creep-based-determination-of-viscoelastic-material-functions-of-polypropylene/>. Date accessed: 05 mar. 2026.
doi:http://dx.doi.org/.
Kotnik, U., Oseli, A., Kutin, J., Halilovič, M., & Slemenik Perše, L.
(0).
Evaluation of Measurement Uncertainty in Creep-Based Determination of Viscoelastic Material Functions of Polypropylene.
Articles in Press, 0(0), .
doi:http://dx.doi.org/
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author = {Urban Kotnik and Alen Oseli and Jože Kutin and Miroslav Halilovič and Lidija Slemenik Perše},
title = {Evaluation of Measurement Uncertainty in Creep-Based Determination of Viscoelastic Material Functions of Polypropylene},
journal = {Articles in Press},
volume = {0},
number = {0},
year = {0},
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abstract = {Modern numerical models use time-dependent material parameters as input data to simulate the viscoelastic response of polymers. Reliable numerical predictions therefore depend on the accurate determination of these parameters. Understanding the measurement uncertainty associated with their identification is essential for assessing the expected range and reliability of the simulation results. This study experimentally analyzes the viscoelastic behavior of polypropylene at 60 °C through tensile and shear creep tests based on extensional and rotational rheometry. The tensile, shear, and bulk compliance functions were determined together with their corresponding standard and expanded measurement uncertainties in accordance with the JCGM 100:2008 guideline. Type A uncertainties were found to dominate the overall uncertainty, with relative expanded uncertainties of approximately 3 percent for shear compliance and up to 25 percent for bulk compliance. The study identifies the main sources of uncertainty and proposes strategies for their reduction, including increasing the number of measurement repetitions and improving environmental control. The results presented in this study quantify the uncertainty associated with creep-based characterization of polypropylene and contribute to more reliable input data for viscoelastic numerical simulations.},
issn = {0039-2480}, pages = {}, doi = {},
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Kotnik, U.,Oseli, A.,Kutin, J.,Halilovič, M.,Slemenik Perše, L.
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Kotnik, Urban, Alen Oseli, Jože Kutin, Miroslav Halilovič, & Lidija Slemenik Perše.
"Evaluation of Measurement Uncertainty in Creep-Based Determination of Viscoelastic Material Functions of Polypropylene." Articles in Press [Online], 0.0 (0): . Web. 05 Mar. 2026
TY - JOUR
AU - Kotnik, Urban
AU - Oseli, Alen
AU - Kutin, Jože
AU - Halilovič, Miroslav
AU - Slemenik Perše, Lidija
PY - 0
TI - Evaluation of Measurement Uncertainty in Creep-Based Determination of Viscoelastic Material Functions of Polypropylene
JF - Articles in Press
DO -
KW -
N2 - Modern numerical models use time-dependent material parameters as input data to simulate the viscoelastic response of polymers. Reliable numerical predictions therefore depend on the accurate determination of these parameters. Understanding the measurement uncertainty associated with their identification is essential for assessing the expected range and reliability of the simulation results. This study experimentally analyzes the viscoelastic behavior of polypropylene at 60 °C through tensile and shear creep tests based on extensional and rotational rheometry. The tensile, shear, and bulk compliance functions were determined together with their corresponding standard and expanded measurement uncertainties in accordance with the JCGM 100:2008 guideline. Type A uncertainties were found to dominate the overall uncertainty, with relative expanded uncertainties of approximately 3 percent for shear compliance and up to 25 percent for bulk compliance. The study identifies the main sources of uncertainty and proposes strategies for their reduction, including increasing the number of measurement repetitions and improving environmental control. The results presented in this study quantify the uncertainty associated with creep-based characterization of polypropylene and contribute to more reliable input data for viscoelastic numerical simulations.
UR - https://www.sv-jme.eu/article/evaluation-of-measurement-uncertainty-in-creep-based-determination-of-viscoelastic-material-functions-of-polypropylene/
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TY - JOUR
AU - Kotnik, Urban
AU - Oseli, Alen
AU - Kutin, Jože
AU - Halilovič, Miroslav
AU - Slemenik Perše, Lidija
PY - 2026/01/19
TI - Evaluation of Measurement Uncertainty in Creep-Based Determination of Viscoelastic Material Functions of Polypropylene
JF - Articles in Press; Vol 0, No 0 (0): Articles in Press
DO -
KW -
N2 - Modern numerical models use time-dependent material parameters as input data to simulate the viscoelastic response of polymers. Reliable numerical predictions therefore depend on the accurate determination of these parameters. Understanding the measurement uncertainty associated with their identification is essential for assessing the expected range and reliability of the simulation results. This study experimentally analyzes the viscoelastic behavior of polypropylene at 60 °C through tensile and shear creep tests based on extensional and rotational rheometry. The tensile, shear, and bulk compliance functions were determined together with their corresponding standard and expanded measurement uncertainties in accordance with the JCGM 100:2008 guideline. Type A uncertainties were found to dominate the overall uncertainty, with relative expanded uncertainties of approximately 3 percent for shear compliance and up to 25 percent for bulk compliance. The study identifies the main sources of uncertainty and proposes strategies for their reduction, including increasing the number of measurement repetitions and improving environmental control. The results presented in this study quantify the uncertainty associated with creep-based characterization of polypropylene and contribute to more reliable input data for viscoelastic numerical simulations.
UR - https://www.sv-jme.eu/article/evaluation-of-measurement-uncertainty-in-creep-based-determination-of-viscoelastic-material-functions-of-polypropylene/
Kotnik, Urban, Oseli, Alen, Kutin, Jože, Halilovič, Miroslav, AND Slemenik Perše, Lidija.
"Evaluation of Measurement Uncertainty in Creep-Based Determination of Viscoelastic Material Functions of Polypropylene" Articles in Press [Online], Volume 0 Number 0 (19 January 2026)
