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Micromechanical characterization of hydrogel-based contact lens
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Li, C., Ahearne, Mark and Liu, Kuo-Kang (2010) Micromechanical characterization of hydrogel-based contact lens. International Journal of Modern Physics B (IJMPB), Vol.24 (No.1-2). pp. 117-127. doi:10.1142/S0217979210064046 ISSN 0217-9792.
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Official URL: http://dx.doi.org/10.1142/S0217979210064046
Abstract
A new micro-shaft-poking (MSP) apparatus has been applied for characterizing the mechanical properties of hydrogel-based contact lens. The instrument allows measurement of the force-displacement curve of the contact lens under a wide range of strain and strain rate. The materials display hysteresis and stress relaxation (50-60%) manifested in the experimental compliance curves. In parallel, a Finite Element Analysis (FEA) modeling incorporated with nonlinear elasticity has been performed for simulating the contact lens under large deformation. Through comparison between the simulated results and experimental data, the mechanical properties, e.g., stiffness, of the lens can be quantitatively determined. The viscoelastic characteristic of the lens has also been parametric fitted based on a five-parameter quasi-viscoelastic model.
Item Type: | Journal Article | ||||
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Subjects: | R Medicine > RE Ophthalmology T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Library of Congress Subject Headings (LCSH): | Colloids -- Mechanical properties, Microelectromechanical systems, Contact lenses, Finite element method , Deformations (Mechanics), Viscoelasticity | ||||
Journal or Publication Title: | International Journal of Modern Physics B (IJMPB) | ||||
Publisher: | World Scientific Publishing Co. Pte. Ltd. | ||||
ISSN: | 0217-9792 | ||||
Official Date: | 20 January 2010 | ||||
Dates: |
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Volume: | Vol.24 | ||||
Number: | No.1-2 | ||||
Number of Pages: | 11 | ||||
Page Range: | pp. 117-127 | ||||
DOI: | 10.1142/S0217979210064046 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Version or Related Resource: | This item was also presented at the Symposium on Mechanical Behavior of Micro- and Nano-Scale System held at the ICMAT 2009, Singapore, Jun 28 - Jul 3, 2009. | ||||
Title of Event: | Symposium on Mechanical Behavior of Micro- and Nano-Scale System held at the ICMAT 2009 | ||||
Location of Event: | Singapore | ||||
Date(s) of Event: | June 28-July 03, 2009 |
Data sourced from Thomson Reuters' Web of Knowledge
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