Material Characterization Method Development: From Education to Design Optimization

C. Morgan[1], N. Kenkare[1], M. Williams[2], A. Peterson[2], and D. Williams[2]
[1]Alcon Eye Care Division of Novartis R&D, Duluth, GA
[2]Alcon Eye Care Division of Novartis R&D and Georgia Institute of Technology Co-op Program, GA
Veröffentlicht in 2011

Introduction of silicone hydrogel contact lens materials provided products of unprecedented capability to deliver oxygen to the eye during wear. One additional material characteristic of interest is the material’s permeability to ions. This paper discusses descriptive tools and optimization of an impedance method of characterizing ion permeability.

A physical model of conductive paper with geometric constraints provides the ability to visualize effects from the design on the electric potential fields in the saline. These physical models are further useful in validation of FEA models that ultimately will be used to arrive at an optimized design. Our project illustrates how the traditional physics lab could allow students to segue to FEA/Multiphysics in a convenient, meaningful way.

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