PDMS Material Models for Anti-fouling Surfaces Using Finite Element Method

Authors

  • Kotchakorn Thanakhun Kasetsart University
  • Tumrong Puttapitukporn Kasetsart University

DOI:

https://doi.org/10.4186/ej.2019.23.6.381

Keywords:

hyperelastic material models, finite element analysis, ANSYS, PDMS, micropillar

Abstract

Ecofriendly anti-fouling surfaces are usually produced by lithographic techniques which will fabricate micropillar-like surfaces made of low surface energy materials such as Polydimethylsiloxane (PDMS). The purposes of this research were to investigate the most suitable Polydimethylsiloxane (PDMS) material model available in ANSYS APDL program to simulate structural behaviors of micropillars subjected to shear loading and to develop micropillar with improved lateral strength. In this research, PDMS material models were derived from experimental data from uniaxial tensile test. The accuracies of the PDMS material models, which were the Neo-Hookean, Mooney-Rivlin 3 and 5 parameters, Ogden (1, 2, 3 terms), Yeoh (1st, 2nd, 3rd order) and Arruda-Boyce material models, were evaluated and compared to experimental data from uniaxial tensile test and punch-shear test. Moreover, micropillars made of a pure PDMS and a Polyurethane Acrylate (PUA) core coated with PDMS were studied to compare their lateral strength under shear loading. We found that the most accurate material model to simulate both the uniaxial tension and shear loading was the Yeoh 3rd order material model; however, these accuracies would valid for small strain range. The lateral strength of a micropillar made of PUA core coated with PDMS was 8.67-time of the one made of pure PDMS. The thickness of the coated material was not a significant effect on lateral strength of the micropillar.

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Author Biographies

Kotchakorn Thanakhun

Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand

Tumrong Puttapitukporn

Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand

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Published In
Vol 23 No 6, Nov 30, 2019
How to Cite
[1]
K. Thanakhun and T. Puttapitukporn, “PDMS Material Models for Anti-fouling Surfaces Using Finite Element Method”, Eng. J., vol. 23, no. 6, pp. 381-398, Nov. 2019.

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