Results 31 to 40 of about 5,430 (219)

A local defect resonance for linear and nonlinear ultrasonic thermography [PDF]

, 2014
An efficient wave-defect interaction is the key to a high thermal response of flaws in ultrasonic thermography. To selectively enhance defect vibrations a concept of local defect resonance is developed and applied to ultrasonic activation of defects ...
Solodov, I., Rahammer, M., Busse, G.
core   +1 more source

Lock-In Thermal Test Simulation, Influence, and Optimum Cycle Period for Infrared Thermal Testing in Non-Destructive Testing

Sensors, 2022
Lock-in thermal tests (LTTs) are one of the best ways to detect defects in composite materials. The parameter that most affects their performance is the cycle period of the stimulation wave.
António Ramos Silva, Mário Vaz, Sofia Leite, Joaquim Mendes   +3 more
doaj   +1 more source

Comparative study on the detection of early dental caries using thermo-photonic lock-in imaging and optical coherence tomography [PDF]

, 2018
Early detection of dental caries is known to be the key to the effectiveness of therapeutic and preventive approaches in dentistry. However, existing clinical detection techniques, such as radiographs, are not sufficiently sensitive to detect and monitor
Shokouhi, Elnaz B., Razani, Marjan, Gupta, Ashish, Tabatabaei, Nima   +3 more
core   +1 more source

On the use of lock-in thermography to monitor delamination growth in composite panels under compression

Science and Engineering of Composite Materials, 2014
The success of composites in automotive, aerospace, and naval applications is mainly related to their aptitude to be tailored to obtain a final product that perfectly fulfills the design requirements.
Toscano Cinzia, Riccio Aniello, Camerlingo FrancescoPaolo, Meola Carosena   +3 more
doaj   +1 more source

Application of NDT thermographic imaging of aerospace structures [PDF]

, 2019
This work aims to address the effectiveness and challenges of Non-Destructive Testing (NDT) inspection and improve the detection of defects without causing damage to the material or operator.
Avdelidis, N. P., Davis, M. J., Deane, S., Ibarra-Castanedo, C., Mackley, T., Maldague, X., Tsourdos, A., Williamson, A. A., Yazdani Nezhad, H., Zhang, H.   +9 more
core   +2 more sources

Non destructive investigation of defects in composite structures by fullfield measurement methods [PDF]

, 2013
This paper presents different interests of non destructive full-field measurement. More precisely, it focuses on the characterization and the comparison of the X-ray tomography and two methods of infrared thermography in order to define the defect ...
Dalverny, Olivier, Génot, Sylvain, Huillery, Richard, Karama, Moussa, Mistou, Sébastien, Pastor, Marie-Laetitia, Péronnet, Elodie   +6 more
core   +2 more sources

Safety Evaluation for Pure Titanium by Lock-in Infrared Thermography [PDF]

MATEC Web of Conferences, 2020
The lock-in infrared thermography has been applied to an estimation of fatigue limits at several stress ratios, i.e., R=-1, 0.05, and 0.5, for commercially pure titanium (CP-Ti JIS grade 2) at room temperature.
Matsunaga T., Nagashima N., Nojima T., Sugimoto S.   +3 more
doaj   +1 more source

Correlation of micro and nano–scale defects with WVTR for aluminium oxide barrier coatings for flexible photovoltaic modules [PDF]

, 2013
This paper seeks to establish a correlation between surface topographical defects and water vapour transmission rate (WVTR) measured under laboratory conditions for aluminium–oxide (Al2O3) barrier film employed in flexible photovoltaic (PV) modules ...
Blunt, Liam, Elrawemi, Mohamed, Fleming, Leigh, Sweeney, Francis   +3 more
core   +1 more source

Proposal of fiber orientation identification method for discontinuous fiber CFRP based on thermal diffusivity distribution measurement using lock-in thermography and demonstration of its effectiveness by mechanical properties

Nihon Kikai Gakkai ronbunshu, 2020
In this study, a novel nondestructive evaluation method is proposed to investigate the fiber orientation distribution of discontinuous Carbon Fiber Reinforced Plastic (CFRP).
Kohei MIYACHI, Yasuyuki MURANAKA, Shinichi NONAKA, Hosei NAGANO   +3 more
doaj   +1 more source

Optical infrared thermography of CFRP with artificial defects : performance of various post-processing techniques [PDF]

, 2018
This paper treats an experimental study that focusses on optical infrared thermography for non-destructive testing of composites through lock-in and flash excitation.
Calderon Tellez, Javier Andres, Hedayatrasa, Saeid, Kersemans, Mathias, Poelman, Gaétan, Segers, Joost, Van Paepegem, Wim   +5 more
core   +2 more sources