Print Email Facebook Twitter Optical coherence elastography for measuring the deformation within glass fiber composite Title Optical coherence elastography for measuring the deformation within glass fiber composite Author Liu, P. Groves, R.M. Benedictus, R. Faculty Aerospace Engineering Department Aerospace Structures & Materials Date 2014-08-01 Abstract Optical coherence elastography (OCE) has been applied to the study of microscopic deformation in biological tissue under compressive stress for more than a decade. In this paper, OCE has been extended for the first time, to the best of our knowledge, to deformation measurement in a glass fiber composite in the field of nondestructive testing. A customized optical coherence tomography system, combined with a mechanical loading setup, was developed to provide pairs of prestressed and stressed structural images. The speckle tracking algorithm, based on 2D cross correlation, was used to estimate the local displacements in micrometer scale. The algorithm was first evaluated by a test of rigid body translation. Then the experiments were carried out with the tensile test and three point bending on a set of glass fiber composites. The structural features and structural variations during the mechanical loadings are clearly observed with the presented displacement maps. The advantages and prospects for OCE application on glass fiber composites are discussed at the end of this paper. Subject optical coherence tomographytomographic image processingspeckle imagingnondestructive testing To reference this document use: http://resolver.tudelft.nl/uuid:1e55ca20-c0b2-449f-904b-4921d04189ae DOI https://doi.org/10.1364/AO.53.005070 Publisher Optical Society of America ISSN 1559-128X Source Applied Optics, 53 (22), 2014 Part of collection Institutional Repository Document type journal article Rights © 2014 Optical Society of America Files PDF Groves_2014.pdf 870.96 KB Close viewer /islandora/object/uuid:1e55ca20-c0b2-449f-904b-4921d04189ae/datastream/OBJ/view