Compressive Behaviors of Micropillar Sheets Made of PDMS Material Using the Finite Element Method

Authors

  • Thitikan Pakawan Kasetsart University
  • Tumrong Puttapitukporn Kasetsart University
  • Nithi Atthi National Electronics and Computer Technology Center (NECTEC), Thailand
  • Witsaroot Sripumkhai National Electronics and Computer Technology Center (NECTEC), Thailand
  • Pattaraluck Pattamang National Electronics and Computer Technology Center (NECTEC), Thailand
  • Nipapan Klunngien National Electronics and Computer Technology Center (NECTEC), Thailand
  • Wutthinan Jeamsaksiri National Electronics and Computer Technology Center (NECTEC), Thailand

DOI:

https://doi.org/10.4186/ej.2020.24.4.73

Keywords:

Finite element analysis, Hyperelastic material model, Hydrophobic, Polydimethylsiloxane, Micropillar sheet, Compreesive strength

Abstract

Thai Microelectronics Center fabricates micropillar sheets from soft lithography techniques and roll-to-roll process which were used as superhydrophobic and superoleophobic surfaces coated on marine structures and medical devices. This research aimed to study appropriate constitutive models and mechanical behaviours of PDMS micropillar sheets with two substrate thicknesses of 1,910 µm and 150 µm under compressive loading using ANSYS Mechanical APDL program. The constitutive models consisted of Mooney-Rivlin (2, 3 and 5 parameters), Ogden (1st, 2nd and 3rd orders), Neo-Hookean, Polynomial (1st and 2nd orders), Arruda-Boyce, Gent and Yeoh (1st, 2nd and 3rd orders) models were curved fitting with experiment data from uniaxial compression test. We found that the most accurate constitutive model was Mooney-Rivlin 5 parameter model for the low strain range . The compressive strength and the lateral collapse of micropillars depended on substrate thickness were studied. The lateral collapse of micropillars was found when the substrate thicknesses were 150 µm and 1,910 µm. As the substrate thickness decreased, the compressive strength decreased while the elastic stiffness increased. The maximum compressive forces per one micropillar were 21.060 µN and 18.549 µN for the 1,910 µm and 150 µm thick substrates respectively.

Downloads

Download data is not yet available.

Author Biographies

Thitikan Pakawan

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

Nithi Atthi

Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand

Witsaroot Sripumkhai

Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand

Pattaraluck Pattamang

Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand

Nipapan Klunngien

Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand

Wutthinan Jeamsaksiri

Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand

Downloads

Published In
Vol 24 No 4, Jul 31, 2020
How to Cite
[1]
T. Pakawan, “Compressive Behaviors of Micropillar Sheets Made of PDMS Material Using the Finite Element Method”, Eng. J., vol. 24, no. 4, pp. 73-84, Jul. 2020.