A5054844553- Thermography and Photoacoustic Techniques
- Welding Techniques and Residual Stresses
- Laser Material Processing Techniques
- Advanced Welding Techniques Analysis
- Mechanical and Thermal Properties Analysis
- Non-Destructive Testing Techniques
- Additive Manufacturing Materials and Processes
- High-Temperature Coating Behaviors
- Advanced Measurement and Detection Methods
- Calibration and Measurement Techniques
- Optical measurement and interference techniques
- Spectroscopy Techniques in Biomedical and Chemical Research
- Fire effects on concrete materials
- Microstructure and Mechanical Properties of Steels
- Industrial Vision Systems and Defect Detection
- Advancements in Materials Engineering
- Advanced Sensor Technologies Research
- Photonic Crystals and Applications
- Terahertz technology and applications
- Microwave and Dielectric Measurement Techniques
- Mechanical Behavior of Composites
- Infrared Target Detection Methodologies
- Numerical methods in engineering
- Thermal properties of materials
- Atmospheric aerosols and clouds
Institute of Materials Research and Engineering
2011-2024
Agency for Science, Technology and Research
2011-2024
Indian Institute of Technology Madras
2015-2023
A*STAR Graduate Academy
2022
Federal Institute For Materials Research and Testing
2016-2018
Association of French Motorway Companies
2017
Laboratoire de Mécanique et Génie Civil
2014
Online (passive) thermographic inspection of overlap joints aluminium and zinc coated steel sheets made by cold metal transfer weld brazing process was explored. Different experimental trials were conducted for demonstrating the feasibility to detect porosities, improper bead differentiate pre temperature. The whole monitored using infrared cameras in different wavelength region. Image analysis algorithms developed reconstruct thermal images that contain signatures defects extract...
The detection and characterization of cracks prior to damage is a technologically economically highly significant task very importance when it comes safety-relevant structures. evaluation components life closely related the presence in it. Laser thermography has already high capability for surface geometry artificial flaws metallic samples. Crack samples at temperature present manufacturing scenario. During casting process billets, form, due suboptimal cooling rates. These reduce value...
Filtering of the sub-band spectral radiation is an attractive technique to overcome lower efficiencies direct conversion thermophotovoltaic technology. The poor performance these systems due relatively small portion incident energy being above bandgap photovoltaic cell. To effectively filter majority sub-bandgap and re-employ it as regenerative heat, a viable solution design efficient spectrally selective ideally matched cell's bandgap. Here, we have explored high contrast amorphous silicon...
The induction heating using a circular coil in Carbon Fiber Reinforced Polymer (CFRP) laminates produces unique patterns, significantly influenced by the fiber orientations each layer and electrical contacts between layers. This study investigates these patterns thermography reveals transition from to rectangular under influence of coil. shift is driven changes interlaminar microstructure, particularly increasing separation at interfaces, interpreted as fewer contacts. research also presents...
Zusammenfassung In diesem Beitrag werden zerstörungsfreie Untersuchungen mittels aktiver Thermografie an Probekörpern aus CFK und GFK mit unterschiedlichen künstlichen Fehlstellen vorgestellt. Dabei wird die zeitliche örtliche Temperaturverteilung nach der Erwärmung Blitzlampen oder einem Infrarot-Strahler einer Infrarot-Kamera erfasst. Zur späteren Rekonstruktion Messdaten wurde ein numerisches Modell entwickelt. Dazu war Bestimmung thermophysikalischen optischen Materialeigenschaften...
In the current work a 3D model has been developed to predict thermal cycles during Tungsten Inert Gas welding of Aluminum 2219. This paper describes step by procedure adopted get actual cooling rate TIG process both experimentally and numerically. The was in COMSOL Finite Element Package considered Gaussian heat distribution. then validated using experimental data collected field experiments on large propellant tanks. Temperature measurements were performed Infrared Camera. Results show...
The detection and characterization of cracks prior to damage is a technologically economically highly significant task critical when it comes safety-relevant structures.The evaluation component's structural health closely related the presence surface cracks.One more promising techniques among NDT thermography.In present work local laser spot excitation for crack simulated using finite element method (FEM).The FEM model simulates heat diffusion phenomena effect known on NiCr coated brass...
Singapore produced more than 982,000 tonnes of plastic waste in 2021. Plastic is among the top 4 generated wastes volume. Astonishingly, has one lowest recycling rates just 6% compared to other 3 highly (99% for ferrous metal, 39% paper, 99% construction waste). Critically, lack effective sorting technologies key factor that inhibits rate. <br/> Existing relies on manual checking printed RIC wastes. As codes could be small size, at different locations objects, and potentially contaminated...
Detecting defects on aerospace surfaces is critical to ensure safety and maintain the integrity of aircraft structures. Traditional methods often need more precision efficiency for effective defect detection. This paper proposes an innovative approach that leverages deep learning infrared imaging techniques detect with high precision. The core contribution our work lies in accurately detecting size depth defects. Our method involves segmenting calculating its centre determine depth. We...
Abstract Particle reinforced polymer matrix composites (PMC) are widely used in the military aviation industry as a stealth coating for incident radar attenuation. These coatings made up of many layers different materials with varying thicknesses. In this study, we terahertz (THz) spectral range by means time-domain spectroscopy (TDS) to examine thickness iron particle polyurethane Radar Absorbing Paint (FE-PU-RAP) composite non-destructively. For accurate estimation individual layer...
A two-dimensional Voronoi tessellation based material model has been introduced to study the heat diffusion phenomena in polycrystalline materials consisting of a distribution grain sizes and shapes.A method control cell-size distributions is presented.As main focus numerical investigation role anisotropy thermal conductivities each material, conductivity tensor cell chosen correspond random crystallographic orientation.A finite element analysis transport from centrally spot-heated sample...