Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates

KUCUK, Yilmaz .
Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 59, n.6, p. 418-422, june 2018. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/modeling-nonlinear-viscoelastic-nanoindentation-of-pvac-at-different-unloading-rates/>. Date accessed: 25 apr. 2024. 
doi:http://dx.doi.org/10.5545/sv-jme.2012.648.

Kucuk, Y.
(2013).
Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates.
Strojniški vestnik - Journal of Mechanical Engineering, 59(6), 418-422.
doi:http://dx.doi.org/10.5545/sv-jme.2012.648

@article{sv-jmesv-jme.2012.648,
	author = {Yilmaz  Kucuk},
	title = {Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {59},
	number = {6},
	year = {2013},
	keywords = {nanolinear viscoelastic nanoindentation; PVAc; viscoelasticity; finite element simulation; FEM; nonlinear Burgers model},
	abstract = {In this study, nanoindentation technique was used to determine the nonlinear viscoelastic behavior of polyvinyl acetate (PVAc) with a glass transition temperature of 29 °C. Nanoindentation was conducted with a Berkovich nanoindenter tip under the same constant loading rate but different unloading rates. The Burgers nonlinear viscoelastic model was implemented in ABAQUS/Standard finite element code by means of a user-defined subroutine. After fitting the complete load-displacement curves, parameters in the nonlinear Maxwell and Voigt elements were obtained to describe the nonlinear viscoelastic behavior of PVAc. The results show that PVAc exhibits negative unloading stiffness under low unloading rates. However, if the unloading rate is higher than 0.1 mN/s, PVAc appears more elastic behavior. The nonlinear Burgers model used can successfully model the nonlinear viscoelastic behavior of PVAc at different unloading rates, including the unloading “nose” associated with negative unloading slope at slow unloading rate for a highly viscoelastic material.},
	issn = {0039-2480},	pages = {418-422},	doi = {10.5545/sv-jme.2012.648},
	url = {https://www.sv-jme.eu/article/modeling-nonlinear-viscoelastic-nanoindentation-of-pvac-at-different-unloading-rates/}
}

Kucuk, Y.
2013 June 59. Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 59:6

%A Kucuk, Yilmaz 
%D 2013
%T Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates
%B 2013
%9 nanolinear viscoelastic nanoindentation; PVAc; viscoelasticity; finite element simulation; FEM; nonlinear Burgers model
%! Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates
%K nanolinear viscoelastic nanoindentation; PVAc; viscoelasticity; finite element simulation; FEM; nonlinear Burgers model
%X In this study, nanoindentation technique was used to determine the nonlinear viscoelastic behavior of polyvinyl acetate (PVAc) with a glass transition temperature of 29 °C. Nanoindentation was conducted with a Berkovich nanoindenter tip under the same constant loading rate but different unloading rates. The Burgers nonlinear viscoelastic model was implemented in ABAQUS/Standard finite element code by means of a user-defined subroutine. After fitting the complete load-displacement curves, parameters in the nonlinear Maxwell and Voigt elements were obtained to describe the nonlinear viscoelastic behavior of PVAc. The results show that PVAc exhibits negative unloading stiffness under low unloading rates. However, if the unloading rate is higher than 0.1 mN/s, PVAc appears more elastic behavior. The nonlinear Burgers model used can successfully model the nonlinear viscoelastic behavior of PVAc at different unloading rates, including the unloading “nose” associated with negative unloading slope at slow unloading rate for a highly viscoelastic material.
%U https://www.sv-jme.eu/article/modeling-nonlinear-viscoelastic-nanoindentation-of-pvac-at-different-unloading-rates/
%0 Journal Article
%R 10.5545/sv-jme.2012.648
%& 418
%P 5
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 59
%N 6
%@ 0039-2480
%8 2018-06-28
%7 2018-06-28

Kucuk, Yilmaz.
"Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates." Strojniški vestnik - Journal of Mechanical Engineering [Online], 59.6 (2013): 418-422. Web.  25 Apr. 2024

TY  - JOUR
AU  - Kucuk, Yilmaz 
PY  - 2013
TI  - Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2012.648
KW  - nanolinear viscoelastic nanoindentation; PVAc; viscoelasticity; finite element simulation; FEM; nonlinear Burgers model
N2  - In this study, nanoindentation technique was used to determine the nonlinear viscoelastic behavior of polyvinyl acetate (PVAc) with a glass transition temperature of 29 °C. Nanoindentation was conducted with a Berkovich nanoindenter tip under the same constant loading rate but different unloading rates. The Burgers nonlinear viscoelastic model was implemented in ABAQUS/Standard finite element code by means of a user-defined subroutine. After fitting the complete load-displacement curves, parameters in the nonlinear Maxwell and Voigt elements were obtained to describe the nonlinear viscoelastic behavior of PVAc. The results show that PVAc exhibits negative unloading stiffness under low unloading rates. However, if the unloading rate is higher than 0.1 mN/s, PVAc appears more elastic behavior. The nonlinear Burgers model used can successfully model the nonlinear viscoelastic behavior of PVAc at different unloading rates, including the unloading “nose” associated with negative unloading slope at slow unloading rate for a highly viscoelastic material.
UR  - https://www.sv-jme.eu/article/modeling-nonlinear-viscoelastic-nanoindentation-of-pvac-at-different-unloading-rates/

@article{{sv-jme}{sv-jme.2012.648},
	author = {Kucuk, Y.},
	title = {Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {59},
	number = {6},
	year = {2013},
	doi = {10.5545/sv-jme.2012.648},
	url = {https://www.sv-jme.eu/article/modeling-nonlinear-viscoelastic-nanoindentation-of-pvac-at-different-unloading-rates/}
}

TY  - JOUR
AU  - Kucuk, Yilmaz 
PY  - 2018/06/28
TI  - Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 59, No 6 (2013): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2012.648
KW  - nanolinear viscoelastic nanoindentation, PVAc, viscoelasticity, finite element simulation, FEM, nonlinear Burgers model
N2  - In this study, nanoindentation technique was used to determine the nonlinear viscoelastic behavior of polyvinyl acetate (PVAc) with a glass transition temperature of 29 °C. Nanoindentation was conducted with a Berkovich nanoindenter tip under the same constant loading rate but different unloading rates. The Burgers nonlinear viscoelastic model was implemented in ABAQUS/Standard finite element code by means of a user-defined subroutine. After fitting the complete load-displacement curves, parameters in the nonlinear Maxwell and Voigt elements were obtained to describe the nonlinear viscoelastic behavior of PVAc. The results show that PVAc exhibits negative unloading stiffness under low unloading rates. However, if the unloading rate is higher than 0.1 mN/s, PVAc appears more elastic behavior. The nonlinear Burgers model used can successfully model the nonlinear viscoelastic behavior of PVAc at different unloading rates, including the unloading “nose” associated with negative unloading slope at slow unloading rate for a highly viscoelastic material.
UR  - https://www.sv-jme.eu/article/modeling-nonlinear-viscoelastic-nanoindentation-of-pvac-at-different-unloading-rates/

Kucuk, Yilmaz"Modeling Nonlinear Viscoelastic Nanoindentation of PVAc at Different Unloading Rates" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 59 Number 6 (28 June 2018)