Adhesion in Hydrogel Contacts

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Overview

Title
Adhesion in Hydrogel Contacts
Contributors
Torres , Jahn Ramon (creator)
Kim, Kyung-Suk (Director)
Jay, Gregory (Reader)
Franck, Christian (Reader)
Brown University. ENGINEERING: Mechanics of Solids (sponsor)
Doi
10.7301/Z0H130DK
Copyright Date
2015
Abstract
A generalized thermoelastic model for adhesion was developed to elucidate the mechanism of dissipation within the viscoelastic bulk of a hydrogel. Results show that in addition to the expected energy release rate of interface formation as well as the viscoelastic drag and viscous flow dissipation, the bulk composition exhibit dissipation due to phase inhomogeneity motion. The mixing thermodynamics of the matrix and solvent composition determine the dynamics of the phase inhomogeneities, which can enhance or disrupt adhesion. The model also accounts for the time dependent behavior since, given enough time, these inhomogeneities can be influenced by image forces at the interface causing migration, which may in turn, affect the dissipation at the interface. A nondimensional parameter is proposed to discern the dominant dissipation mechanism in hyperelastic contact detachment.
Keywords
contacts
dissipation
Eshelby
Clausius-Duhem
inhomogeneity
lubricin
PRG4
hydrogel
polymer brush
biofouling
graded modulus
wrinkle
AFM calibration
diamagnetic normal force calibration
D-NFC
poly(dimethyl) siloxane
PDMS
Adhesion
Tribology
Energy dissipation
Fouling
Atomic force microscopy
Polydimethylsiloxane
Notes
Thesis (Ph.D. -- Brown University (2015)
Extent
18, 109 p.

Citation

Torres , Jahn Ramon, "Adhesion in Hydrogel Contacts" (2015). Mechanics of Solids Theses and Dissertations. Brown Digital Repository. Brown University Library. https://doi.org/10.7301/Z0H130DK

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