Keywords

Adhesives, Aluminum oxide, Nanocomposites (Materials), Spectrum analysis, PSLS -- photo stimulated luminescence spectroscopy

Abstract

A non-invasive method to quantify the stress distribution in polymer-based materials is presented through the piezospectroscopic calibration of alumina-epoxy nanocomposites. Three different alumina volume fraction nanocomposites were created and loaded under uniaxial compression in order to determine the relationship between applied stress and the frequency shift of the R-lines produced by alumina under excitation. Quantitative values for six piezospectroscopic coefficients were obtained which represent the stress-sensing property of the nanocomposites. The results were applied to an alumina-filled adhesive in a single lap shear configuration demonstrating the capability of the technique to monitor R-line peak positions with high spatial resolution and assess the stress distribution within the material prior to failure. Additionally, particle dispersion and volume fraction were confirmed with spectral intensities, introducing a novel experimental method for the assessment of quality in manufacturing of such nanocomposites. Results were further used to initiate studies in determining the load transfer to the nanoparticles and assessing the fundamental driving mechanisms.

Notes

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Graduation Date

2011

Semester

Spring

Advisor

Raghavan, Seetha

Degree

Master of Science (M.S.)

College

College of Engineering and Computer Science

Department

Mechanical, Materials, and Aerospace Engineering

Format

application/pdf

Identifier

CFE0003744

URL

http://purl.fcla.edu/fcla/etd/CFE0003744

Language

English

Release Date

May 2011

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

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