Characterizing Defects in Materials with Fusion of Thermography and Shearography
Sign Up to like & getrecommendations! Published in 2021 at "Measurement"
DOI: 10.1016/j.measurement.2021.109736
Abstract: Abstract Thermography and shearography are optical techniques for detecting and characterizing subsurface defects in structures. Both techniques possess unique advantages and abilities, as well as limitations, based on their distinct mechanisms. In this study, the… read more here.
Keywords: characterizing defects; defects materials; shearography; thermography shearography ... See more keywords
Two procedures for out-of-plane displacement calculation in simultaneous shearography images
Sign Up to like & getrecommendations! Published in 2022 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2021.106828
Abstract: Abstract Shearography is an interferometric technique capable of measuring the gradient of the displacement field. Shearography has also been used to determine out-of-plane displacement fields. In the latter case, conventional integration procedures are not the… read more here.
Keywords: technique; shearography images; integration; two procedures ... See more keywords
Improved depth characterization of internal defect using the fusion of shearography and speckle interferometry
Sign Up to like & getrecommendations! Published in 2021 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2020.106701
Abstract: Abstract A hybrid nondestructive testing (NDT) approach based on the fusion of shearography and digital speckle pattern interferometry (DSPI) is proposed for depth characterization of internal defect. To this end, a novel dual-sensitive speckle interferometry… read more here.
Keywords: internal defect; depth characterization; shearography; defect ... See more keywords
Identification of multiple damage using modal rotation obtained with shearography and undecimated wavelet transform
Sign Up to like & getrecommendations! Published in 2019 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2018.07.024
Abstract: Abstract Due to its high spatial resolution measurements and flexible and contactless experimental setup, shearography, as a non-destructive testing technique, provides effective structural damage identifications. However, this effectiveness can be increased by applying post-processing algorithms… read more here.
Keywords: shearography; damage; multiple damage; undecimated wavelet ... See more keywords
Multi-directional shearography based on multiplexed Mach–Zehnder interference system
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Modern Optics"
DOI: 10.1080/09500340.2020.1733115
Abstract: ABSTRACT Shearography is only sensitive to deformation in the shearing direction, and the deformation of object defects after loading may occur in multiple directions. This work reports a multi-direction shearography system that uses spatial phase-shift… read more here.
Keywords: zehnder interference; system; multiplexed mach; mach zehnder ... See more keywords
Photothermal Radar Shearography: A Novel Transient-Based Speckle Pattern Interferometry for Depth-Tomographic Inspection
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Industrial Informatics"
DOI: 10.1109/tii.2021.3124576
Abstract: As an increasingly recognized optical interferometric technique for nondestructive testing and evaluation, shearography has attracted extensive interest in various industrial applications. However, it suffers from the ignorance of the whole process of dynamic surface deformation… read more here.
Keywords: depth; dynamic surface; photothermal radar; speckle pattern ... See more keywords
3D shape shearography technique for surface strain measurement of free-form objects.
Sign Up to like & getrecommendations! Published in 2019 at "Applied optics"
DOI: 10.1364/ao.58.000498
Abstract: Shearography is a non-destructive testing technique that provides full-field surface strain characterization. Previous inspection of flat objects or simple geometric shapes has been reported. However, real-life objects especially in aerospace, transport, or cultural heritage are… read more here.
Keywords: shearography; shape shearography; strain measurement; free form ... See more keywords
Simultaneous 3D measurement of deformation and its first derivative with speckle pattern interferometry and shearography.
Sign Up to like & getrecommendations! Published in 2019 at "Applied optics"
DOI: 10.1364/ao.58.008665
Abstract: Digital speckle pattern interferometry and digital shearography are widely used in nondestructive testing due to their advantages of high speed, full field, and high sensitivity. However, traditional speckle pattern interferometry and shearography can only measure… read more here.
Keywords: pattern interferometry; speckle pattern; shearography;