Title

Stress and structural damage sensing piezospectroscopic coatings validated with digital image correlation

Authors

Authors

G. Freihofer; J. Dustin; H. Tat; A. Schulzgen;S. Raghavan

Comments

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Abbreviated Journal Title

AIP Adv.

Keywords

FLUORESCENCE; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied

Abstract

The piezospectroscopic effect, relating a material's stress state and spectral signature, has recently demonstrated tailorable sensitivity when the photo-luminescent alpha alumina is distributed in nanoparticulate form within a matrix. Here, the stress-sensing behavior of an alumina-epoxy nanoparticle coating, applied to a composite substrate in an open hole tension configuration, is validated with the biaxial strain field concurrently determined through digital image correlation. The coating achieved early detection of composite failure initiation at 77% failure load, and subsequently tracked stress distribution in the immediate vicinity of the crack as it progressed, demonstrating non-invasive stress and damage detection with multi-scale spatial resolution. (C) 2015 Author(s).

Journal Title

Aip Advances

Volume

5

Issue/Number

3

Publication Date

1-1-2015

Document Type

Article

Language

English

First Page

5

WOS Identifier

WOS:000352449500040

ISSN

2158-3226

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