Publications
16-Journals, 26-International Conferences, 10-National Conferences
Peer-reviewed Journal:
Renil T., Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, and K. Balasubramaniam. Uncovering the Hidden Structure: A Study on the Feasibility of Induction Thermography for Fiber Orientation Analysis in CFRP Composites using 2D-FFT, 2024.
Renil T., Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, and K. Balasubramaniam. Induction Thermography for Unidirectional CFRP Composites: A Novel Inspection Approach through Global Current Path Integration, Composite Structures, 2024.
Sreedhar Unnikrishnakurup, Zheng ZHANG, Debbie Hwee Leng SENG, Zhi-qian ZHANG, Jisheng PAN, Vinod KUMAR, Jonathan ZHENG, Carlos MANZANO and Andrew NGO, Exploring Thermal Dynamics and Porosity of Cold-Sprayed Ti-6Al-4V Coatings: A Pulsed Thermography and Numerical Modelling Approach, International Journal of Thermal Sciences, 2024.
A Mercy Latha, Sreedhar Unnikrishnakurup, Abhinandan Jain, MK Pathra, Krishnan Balasubramaniam. Material characterization and thickness measurement of iron particle reinforced polyurethane multi-layer coating for aircraft stealth applications using THz-Time Domain Spectroscopy. Journal of Infrared, Millimeter, and Terahertz Waves. https://doi.org/10.1007/s10762-022-00874-2 2022.
Renil T., Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, and K. Balasubramaniam. The influence of interlaminar microstructure on the induction heating patterns of CFRP laminates. Materials Today Communications,33, 104338, https://authors.elsevier.com/c/1fl0q8MvHg-X~P 2022.
D Gamdha, Sreedhar Unnikrishnakurup, and K Balasubramaniam. Automated defect recognition on X-ray radiographs of solid propellant using deep learning based on convolutional neural networks, Journal of Nondestructive Evaluation 40, 18 (2021)., https://doi.org/10.1007/s10921-021-00750-4, 2021
Surendra G, Ameen E, Sreedhar Unnikrishnakurup, A. Veera Ragavan, K. Balasubramaniam, Bala Pesala. Spectral filtering of sub-bandgap radiation using all-dielectric metasurface for thermophotovoltaic applications, Journal of Photonics for Energy, 11(1), 015501. https://doi.org/10.1117/1.JPE.11.015501, 2021.
Sreedhar Unnikrishakurup, Jyoti D, S. Ray, Bala Pesala, K. Balasubramaniam. Nondestructive evaluation of Thermal Barrier coating thickness degradation using Infrared Thermography and THz TDS, NDT&E, 116, 102367, https://doi.org/10.1016/j.ndteint.2020.102367, 2020.
A. Saini, Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, K. Balasubramaniam. Numerical study using FEM of heat conduction in heterogeneous material with varying volume fraction, shape and size of filler in matrix, International Journal of Thermal Sciences, 159, 106545 https://doi.org/10.1016/j.ijthermalsci.2020.106545, 2020.
Nithin P., Renil T., Sreedhar Unnikrishnakurup, P. Myrach, M. Zeigler, and K. Balasubramaniam, Laser line scanning thermography for surface breaking crack detection: Modeling and experimental study. Infrared Physics and Technology, 104, https://doi.org/10.1016/j.infrared.2019.103141, 2020.
Nithin P. V, K. Renil Thomas, Sreedhar Unnikrishnakurup, Prabhu Rajagopal, K. V. Phani Prabhakar, G. Padmanabham, K. Balasubramaniam. Numerical model and experimental validation for the on-line monitoring of Cold Metal Transfer joining of aluminum to galvanized steel, International Journal of Advanced Manufacturing Technology, 104, 4365-4375, https://doi.org/10.1007/s00170-019-04282-0, 2019.
C. Maierhofer, R. Krankenhagen, M. Röllig, Sreedhar Unnikrishnakurup, C. Monte, A. Adibekyan, B. Gutschwager, L. Kanzowicka, A. Blahut, M. R. L. Gower, M. Lodeiro, G. Baker, A. Aktas, Influence of thermal and optical material properties on the characterization of defects in fiber reinforced composites with active thermography methods, Journal of Technisches Messen, 2018.
Sreedhar Unnikrishnakurup, S. ROUQUETTE, F. SOULIE, G. FRAS. Estimation of heat flux parameters during static gas tungsten arc welding spot under argon shielding. International Journal of Thermal Sciences, 114C, 205-212, 2017.
K. Renil Thomas, Sreedhar Unnikrishnakurup, P. V. Nithin, Krishnan Balasubramaniam, Prabhu Rajagopal, K. V. Phani Prabhakar, G. Padmanabham, Frank Riedel and Markus Puschmann. Online monitoring of cold metal transfer (CMT) process using infrared thermography, Quantitative Infrared Thermography Journal, Vol. 14, No. 1, 68-78, DOI: 10.1080/17686733:2016.1229330, 2017.
Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, Krishnan Balasubramaniam. Monitoring TIG Welding using Infrared Thermography- Simulations and Experiments. Przeglad Elektrotechniczny, ISSN 0033-2097, R. 92 NR 4/2016.
U. Sreedhar, C. V. Krishnamurthy, Krishnan Balasubramaniam, V. Reghupathi, S. Ravisankar. Automatic defect identification using thermal image analysis for online weld quality monitoring. Journal of Materials Processing Technology. 212(2012) 1557- 1566.
Forthcoming:
Renil T., Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, and K. Balasubramaniam. Fiber alignment detection in CFRP composites using Induction Thermography and Radon Transform, 2024.
International Conferences:
S. O. A. Gnessougou, Sreedhar Unnikrishnakurup, Andrew Ngo, Pierre Servais, C. Ibarra-Castanedo, X. Maldague. Curved CFRP specimen: Thermographic inspection and simulation, 4th Asian Quantitative Infrared Thermography Conference, Abu Dhabi, UAE, Oct 30- Nov 2, 2023
Sreedhar Unnikrishnakurup, Renil Thomas Kidangan, C. V. Krishnamurthy, K. Balasubramaniam. Characterizing fiber orientations and layer stacking sequences in CFRP laminates through induction heating patterns: A non-destructive approach, 4th Asian Quantitative Infrared Thermography Conference, Abu Dhabi, UAE, Oct 30- Nov 2, 2023.
Sreedhar Unnikrishnakurup, Vinod Kumar, Jonathan Zheng, Carlos Manzano, Andrew Ngo. Exploring ambient influences on infrared thermography: A study on concrete delamination detection and solar loading, 4th Asian Quantitative Infrared Thermography Conference, Abu Dhabi, UAE, Oct 30- Nov 2, 2023.
Sreedhar Unnikrishnakurup, Zheng, J., Kumar, V., Manzano, C. and Ngo, A., 2022. Crack Detection in Metallic Components with Varying Surface Characteristics Using Laser Spot Scanning Thermography (No. 8955). 4th Singapore International Non-Destructive Testing Conference & Exhibition, SINCE2022, Singapore, November 7-8, 2022.
Kumara, Vinod, Carlos Manzano, Sreedhar Unnikrishnakurup, Jonathan Zheng, and Andrew Ngob. "Dynamic Inspection of Surface-Breaking Defects using Induction Thermography." 4th Singapore International Non-Destructive Testing Conference & Exhibition, SINCE2022, Singapore, November 7-8, 2022.
Zheng, Jonathan, Carlos Manzano, Sreedhar Unnikrishnakurup, Vinod Kumar, and Andrew Ngo. "Using Hyperspectral Imaging as a Non-Destructive Method to Discern Artworks." 4th Singapore International Non-Destructive Testing Conference & Exhibition, SINCE2022, Singapore, November 7-8, 2022.
Sreedhar Unnikrishnakurup, J. Zheng, C. Manzano, C. Y. Ngo. Numerical and Experimental investigations of pulsed infrared Thermography for damage detection in Honeycomb Sandwich Composites. 16th Quantitative Infrared Thermography Conference, Paris, France, July 04-08, 2022.
Jyothi D, Sreedhar Unnikrishnakurup, Bala P, K Balasubramaniam, Material parameters and thickness determination of thermal barrier coatings using Terahertz time domain spectroscopy, Virtual Conference and Exhibition on Nondestructive Evaluation (NDE), Virtual Conference, December 10-12, 2020.
Surendra G, Ameen E, Ananthanarayanan Veeraraghavan, Sreedhar Unnikrishnakurup, Krishna Balasubramaniam, Bala Pesala, High Contrast grating based broadband thermal filters for thermophotovoltaic applications, SPIE. Photonic West OPTO, San Francisco, US, February 1-6, 2020.
Sreedhar Unnikrishnakurup, Jyothi D, Bala P, K Balasubramaniam, Non-destructive evaluation of thermal barrier coating thickness degradation using Pulse phase thermography and THz-TDS, 11th International Symposium on NDT in Aerospace, Paris-Saclay, November 13-15, 2019.
Nithin P., Renil T., Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, M. Zeigler, P. Myrach, and K. Balasubramaniam, Numerical study of laser line thermography for crack detection at elevated temperature. 14th Quantitative Infrared Thermography Conference, Berlin, Germany, June 25-29, 2018.
Sruthi Krishna K P, N. Puthiyaveetil, R. Kidangan, Sreedhar Unnikrishnakurup, M. Zeigler, P. Myrach, K. Balasubramaniam, and P Biju. Raw data based image processing algorithm for fast detection of surface breaking cracks. 43rd Annual Review of Progress in Quantitative Nondestructive Evaluation, AIP Conference Proceedings 1806, 140008 (2017); doi: 10.1063/1.4974723, 2017.
Renil T., Sreedhar Unnikrishnakurup, K. Balasubramaniam, L. Narayanan, Phanikumar G., Dissimilar metal joint quality measurement using infrared thermography: Experimental and Numerical approach for the application to CMT welding, Quantitative InfraRed Thermography, Gdańsk, Poland, July 4-8, 2016.
N. Puthiyaveettil, S. Krishna, R. Kidangan, Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, M. Zeigler, P. Myrach and K. Balasubramaniam, In-line laser thermography for crack detection at elevated temperature: A numerical modeling study, Quantitative InfraRed Thermography, Gdańsk, Poland, July, 4-8, 2016.
B. Polomski, P. Myrach, E. Le Claire, Sreedhar Unnikrishnakurup, N. Vengara, K. Balasubramaniam, M. Ziegler. Thermographic crack detection in hot steel surface, 19th World Conference on Non-destructive Testing (WCNDT), Munich, Germany, June 13-17, 2016.
R.T. Kidangan, Sreedhar Unnikrishnakurup, N. Puthiyaveettil, K. Balasubramaniam, P. Rajagopal, K. V. Phani Prabhakar, G. Padmanabham, Application of Infrared Thermography technique for the monitoring of Cold Metal Transfer (CMT) joining of aluminium to galvanized steel, 19th World Conference on Non-destructive Testing (WCNDT), Munich, Germany, June 13-17, 2016.
Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, K. Balasubramaniam. Heat diffusion in Polycrystalline Materials - A microstructure based material model: Quantitative Infrared Thermography Conference QIRT-Asia, Mahabalipuram, India, July 6-10, 2015.
B. Szymznik, Sreedhar Unnikrishnakurup, Tomasz Chady, K. Balasubramaniam. Numerical Analysis of Heat sink Effect in the Infrared inspection of composites: Quantitative Infrared Thermography Conference QIRT-Asia, Mahabalipuram, India, July 6-10, 2015.
Nithin P. V., Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, M. Zeigler, P. Myrach and K. Balasubramaniam. In-line Laser Thermography for Crack Detection: A Numerical Approach: Quantitative Infrared Thermography Conference QIRT-Asia, Mahabalipuram, India, July 6-10, 2015.
Sreedhar Unnikrishnakurup, K. Balasubramaniam, S. Gollapudi and S. Kuchibhatla. Non-Destructive Evaluation of Seams and Composites at IIT Madras: Research seminar SAINT-GOBAIN University Day, Paris, France, June 8, 2015.
Tomasz Chady, Yijin Li, Sreedhar Unnikrishnakurup. Evaluation of THz Systems for Composite Structures Inspection: XVIII International Symposium on Theoretical Electrical Engineering ISTET'15 & Symposium on Electromagnetic Evaluation of Materials SEEM'15, Kolobrzeg, Poland, June 7th- 10th, 2015.
Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, Krishnan Balasubramaniam. Monitoring TIG Welding using Infrared Thermography- Simulations and Experiments: XVIII International Symposium on Theoretical Electrical Engineering ISTET'15 & Symposium on Electromagnetic Evaluation of Materials SEEM'15, Kolobrzeg, Poland, June 7th- 10th, 2015.
S. Rouquette, F. Soulie, Sreedhar Unnikrishnakurup. Gaussian heat flux parameter estimation during a GTAW operation. International conference on inverse problems in engineering, Krakow, Poland, May 2014.
Sreedhar Unnikrishnakurup, G. Fras, S. Rouquette, F. Soulie, "Estimation of the heat flux exchanged between argon electrical arc plasma and stainless steel anode: application to GTAW experiment", 4th International Symposium on Inverse Problems, Design and Optimization IPDO-2013. Albi: France (June 2013), 2013.
Sreedhar Unnikrishnakurup, G. Fras, S. Rouquette, F. Soulie, "Multi-physics modeling of GTAW process and experimental validation for investigating the weld pool formation", International seminar Numerical Analysis of weldability. Graz: Austria (September 2012), 2012.
Sreedhar Unnikrishnakurup, G. Fras, S. Rouquette, F. Soulie, "Heat flux parameter estimation by the Levenberg-Marquardt method: Application to the gas tungsten arc welding", International seminar in Inverse Problems. Issac Newton Institute of Mathematical Science, University of Cambridge (December 2011), 2011.
National Conferences:
Jyoti D, Sreedhar Unnikrishnakurup, S. Ray, Bala Pesala, K. Balasubramaniam.Material Parameter Extraction of Thermal Barrier Coating Sample using Terahertz Time-Domain Spectroscopy, National Seminar and Exhibition on Non-Destructive Evaluation Virtual Conference (NDE-2019), December, 2020.
D Gamdha, S Dwarakanath, Sreedhar Unnikrishnakurup, and K Balasubramaniam. Simulation assisted annotated xray image data generation for deep learning applications. In National Seminar and Exhibition on Non-Destructive Evaluation (NDE-2019), Bangalore, India, December 4-7, 2019.
S Krishna, Sreedhar Unnikrishnakurup, and K Balasubramaniam, Evaluation of thermal barrier coating thickness using pulsed thermography experiments and numerical simulations, NDE, Mumbai, Dec 19-21, 2018.
C. Maierhofer, R. Krankenhagen, M. Röllig, Sreedhar Unnikrishnakurup, C. Monte, A. Adibekyan, B. Gutschwager, L. Kanzowicka, A. Blahut, M. R. L. Gower, M. Lodeiro, G. Baker, A. Aktas, Einfluss thermischer und optischer Materialeigenschaften auf die charakterisierung von fehlstellen in faserverbund-werkstoffenmit aktiven thermografieverfahren. Temperature, Berlin, 2017.
S. Shivaprasad, Sreedhar Unnikrishnakurup, S. Natarajan, C. V. Krishnamurthy, K. Balasubramaniam. 3D Elastic wave propagation and heat diffusion studies using polycrystalline material models, NDE 2015, Hyderabad, India, November, 26-28, 2015.
Sreedhar Unnikrishnakurup, P. V. Nithin, C. V. Krishnamurthy, M. Zeigler, P. Myrach and K. Balasubramaniam. The effect of surface breaking crack orientation in detection capability: A laser thermography numerical modeling approach, NDE 2015, Hyderabad, India, November 26-28, 2015.
S. Shivaprasad, Sreedhar Unnikrishnakurup, C. V. Krishnamurthy, K. Balasubramaniam. Elastic wave propagation and heat diffusion studies in polycrystalline material, Comsol Conference, Pune, India, Oct 29-30, 2015.
B. Szymanik, Sreedhar Unnikrishnakurup, Krishnan Balasubramaniam. Background Removal in Thermographic Non Destructive Testing of Composite Materials: National Seminar and Exhibition on Non-Destructive Evaluation NDE-2014, Pune, India, December 4-6, 2014.
Sreedhar Unnikrishnakurup, G. Fras, S. Rouquette, F. Soulie, "Multi-physics modeling of GTAW process", La Journée conference des doctorants de l’I2S (DOCTISS). The Graduate School for Information, Structures and Systems Sciences (I2S), Montpellier, June 2012.
U. Sreedhar, C. V. Krishnamurthy, K. Balasubramaniam, V. Raghupathi, S. Ravisankar, "Modeling and Simulation for Temperature Prediction in Welding Using Infrared Thermography", National Seminar NDE 2009.
Ph.D. thesis:
Sreedhar Unnikrishnakurup, "Static GTAW: Experimental and Numerical Investigation and Heat Flux Parameter Estimation", University of Montpellier 2, 2014.
Master thesis:
Sreedhar U, "Online Weld Quality Monitoring Using Infrared Thermal Imaging", Indian Institute of Technology Madras, 2010.