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Full-field pulsed magneto-photoelasticity – Experimental Implementation

Gibson, S., Tomlinson, R.A. and Jewell, G.W. (2006) Full-field pulsed magneto-photoelasticity – Experimental Implementation. Journal of Strain Analysis for Engineering Design, 41 (2). pp. 171-182. ISSN 0309-3247

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Abstract

This paper contains a description of the experimental procedure employed when using a pulsed-magneto-polariscope (PMP) and some initial full-field through-thickness measurements of the stress distribution present in samples containing 3D stresses. The instrument uses the theory of magneto-photoelasticity (MPE), which is an experimental stress analysis technique that involves the application of a magnetic field to a birefringent model within a polariscope. MPE was developed for through-thickness stress measurement where the integrated through-thickness birefringent measurement disguises the actual stress distribution. MPE is mainly used in toughened glass where the through-thickness distribution can reduce its overall strength and so its determination is important. To date MPE has been a single-point 2D through-thickness measurement and the analysis time is prohibitive for the investigation of an area which may contain high localised stresses. The pulsed-magneto-polariscope (PMP) has been designed to enable the application of full-field 3D MPE [ ]. Using a proof-of concept PMP several experimental measurements were made, these were promising and demonstrate the potential of the new instrument. Further development of this technique presents several exciting possibilities including a tool for the measurement of the distribution of principal stress difference seen in a general 3D model.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright (c) 2006 Professional Engineering Publishing. Uploaded with permission from the publisher and in accordance with the publisher's self-archiving policy.
Keywords: Three-dimensional photoelasticity, residual stress measurement, toughened glass.
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield)
Depositing User: Mr Christopher Hardwick
Date Deposited: 02 Nov 2009 12:54
Last Modified: 08 Feb 2013 16:59
Published Version: http://dx.doi.org/10.1243/03093247JSA93
Status: Published
Publisher: Professional Engineering Publishing
Refereed: Yes
Identification Number: 10.1243/03093247JSA93
URI: http://eprints.whiterose.ac.uk/id/eprint/9207

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