Sensitivity and uncertainty analysis by discontinuous Galerkin of lock-in thermography for crack characterization
Sign Up to like & getrecommendations! Published in 2021 at "Computer Methods in Applied Mechanics and Engineering"
DOI: 10.1016/j.cma.2020.113523
Abstract: Abstract This work focuses on the characterization of narrow vertical cracks of finite size using optically excited lock-in thermography (OLT). To characterize these cracks, we need to solve an ill-posed inverse problem. As a previous… read more here.
Keywords: lock thermography; uncertainty; discontinuous galerkin; analysis ... See more keywords
Lock-in thermography as a rapid and reproducible thermal characterization method for magnetic nanoparticles
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Magnetism and Magnetic Materials"
DOI: 10.1016/j.jmmm.2016.11.012
Abstract: Abstract Lock-in thermography (LIT) is a sensitive imaging technique generally used in engineering and materials science ( e.g. detecting defects in composite materials). However, it has recently been expanded for investigating the heating power of… read more here.
Keywords: lock thermography; rapid reproducible; method; size ... See more keywords
Visualization of deformation-induced changes in carbon nanotube networks in rubber composites using lock-in thermography.
Sign Up to like & getrecommendations! Published in 2023 at "RSC advances"
DOI: 10.1039/d3ra00717k
Abstract: In this study, we used the lock-in thermography technique (LIT) to successfully visualize the single-walled carbon nanotube (CNT) networks during the tensile deformation of CNT/fluoro-rubber (FKM) composites. The LIT images revealed that the CNT network… read more here.
Keywords: lock thermography; network; carbon nanotube; deformation ... See more keywords
Investigation of Multiple Heat Source Effects in Lock-In Thermography Applications in Semiconductor Packages
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Components, Packaging and Manufacturing Technology"
DOI: 10.1109/tcpmt.2018.2822765
Abstract: Three-dimensional (3-D) packages have become a technology integrator for multiple functional devices into one component as a cost-effective way to enable Moore’s law for continuous scale-down. There are new challenges arising from the 3-D packages… read more here.
Keywords: multiple; lock thermography; multiple heat; semiconductor ... See more keywords
Autonomous mobile lock-in thermography system for detecting and quantifying voids in liquefied natural gas cargo tank second barrier
Sign Up to like & getrecommendations! Published in 2017 at "Structural Health Monitoring"
DOI: 10.1177/1475921716651810
Abstract: In this study, an autonomous mobile inspection system that can detect and quantify hidden voids in a secondary barrier (triplex layer) of a liquefied natural gas cargo tank is developed using lock-in thermography. The triplex… read more here.
Keywords: lock thermography; barrier; system; gas ... See more keywords
Defect detectability based on square wave lock-in thermography.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.460385
Abstract: A lock-in thermography technique based on a periodical square wave is used to detect stainless steel plates with defects. Combining a neural network with lock-in thermography, an image processing technique is proposed, and the results… read more here.
Keywords: square wave; lock thermography; image; thermography ... See more keywords
On the Thickness Quantification of Composite Materials by Using Lock-In Thermography
Sign Up to like & getrecommendations! Published in 2019 at "Materials"
DOI: 10.3390/ma12071185
Abstract: Many structural components made of composite materials need an accurate thickness control during fabrication and/or maintenance. In this regard, various non-destructive techniques can be used for the online measuring of thickness of large components such… read more here.
Keywords: lock thermography; thickness quantification; composite materials; quantification composite ... See more keywords
Sizing the Depth and Width of Narrow Cracks in Real Parts by Laser-Spot Lock-In Thermography
Sign Up to like & getrecommendations! Published in 2021 at "Materials"
DOI: 10.3390/ma14195644
Abstract: We present a complete characterization of the width and depth of a very narrow fatigue crack developed in an Al-alloy dog bone plate using laser-spot lock-in thermography. Unlike visible micrographs, which show many surface scratches,… read more here.
Keywords: depth; lock thermography; spot lock; laser spot ... See more keywords
The Impact of Excitation Periods on the Outcome of Lock-In Thermography
Sign Up to like & getrecommendations! Published in 2023 at "Materials"
DOI: 10.3390/ma16072763
Abstract: Thermal imaging is a non-destructive test method that uses an external energy source, such as a halogen lamp or flash lamp, to excite the material under test and measure the resulting temperature distribution. One of… read more here.
Keywords: excitation; lock thermography; phase image; phase ... See more keywords
Convolution Neural Network Fusion Lock-In Thermography: A Debonding Defect Intelligent Determination Approach for Aviation Honeycomb Sandwich Composites (HSCs)
Sign Up to like & getrecommendations! Published in 2023 at "Metals"
DOI: 10.3390/met13050881
Abstract: This report is on convolution neural network (CNN) fusion lock-in thermography, which can implement the intelligent identification of defects for aviation honeycomb sandwich composites (HSCs). First, HSCs specimens with subsurface delamination defects were fabricated and… read more here.
Keywords: neural network; convolution neural; lock; fusion lock ... See more keywords