The Open UniversitySkip to content
 

Measuring viscoelastic properties using compliant systems

Andrews, James W.; Cheneler, David and Bowen, James (2014). Measuring viscoelastic properties using compliant systems. In: Cell Adhesion Century: Culture Breakthrough, 28-29 April 2014, London, UK.

Full text available as:
[img]
Preview
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (619kB) | Preview
URL: https://www.academia.edu/9823275/Measuring_viscoel...
Google Scholar: Look up in Google Scholar

Abstract

An analysis of a novel indentation model has been implemented to obtain master curves describing the optimal experimental parameters necessary to achieve the highest possible accuracy in the determination of viscoelastic properties of soft materials. The indentation model is a rigid indenter driven by a compliant measurement system, such as an atomic force microscope or optical tweezers, into a viscoelastic half space. The viscoelastic material is described as a multiple relaxation Prony series. The results have been extended via an application of a viscoelastic equivalence principle to other physical models such as poroelasticity. Optimisation of the indentation parameters has been conducted over many orders of magnitude of the velocity, viscoelastic moduli, spring stiffness, relaxation times and the duration of indentation resulting in a characteristic master curve. It is shown that using sub-optimal conditions gives the appearance of a more elastic material than is actually the case. For a two term Prony series the ideal ramp duration was found to be approximately one eighth of the relaxation. Also the ideal ramp duration for a three term Prony series was determined and shown to guarantee distinct relaxation times under specific conditions.

Item Type: Conference or Workshop Item
Project Funding Details:
Funded Project NameProject IDFunding Body
FP7 programme (NANOBIOTOUCH Project)FP7-NMP-228844EU
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 43389
Depositing User: James Bowen
Date Deposited: 09 Jun 2015 13:34
Last Modified: 17 Nov 2016 17:49
URI: http://oro.open.ac.uk/id/eprint/43389
Share this page:

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU