Items where Author is "Rajagopal, Prabhu"

Article

Pandit, Rahul Kumar ; Khan, Ainulla ; Balasubramanian, Krishnan ; Srinivasan, Balaji ; Rajagopal, Prabhu (2025) Defect identification using sampling and outlier analysis in passive guided wave structural health monitoring Journal of Intelligent Material Systems and Structures, 36 (8). pp. 543-560. ISSN 1045-389X

Kumar, S. R. Sandeep ; Ramachandran, Vineeth P. ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2023) Graded elastic waveguide metamaterial rod for up-conversion of longitudinal axisymmetric guided ultrasonic wave modes IEEE Open Journal of Ultrasonics, Ferroelectrics, and Frequency Control, 3 . pp. 157-165. ISSN 2694-0884

Puthiyaveettil, Nithin ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2022) Laser spot thermography for defect detection on mild steel at higher temperatures (30–600 °C) Journal of Applied Physics, 132 (4). ISSN 0021-8979

Davis, Geo ; Koodalil, Dileep ; Palanisamy, Suresh ; Nagarajah, Romesh ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2022) Influence of duty ratio of a pattern source on laser generation of Lamb waves NDT & E International, 127 . p. 102605. ISSN 0963-8695

Koodalil, Dileep ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2021) Quantifying adhesive thickness and adhesion parameters using higher-order SH guided waves Ultrasonics, 114 . p. 106429. ISSN 0041-624X

S R, Sandeep Kumar ; V K, Krishnadas ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2021) Waveguide metamaterial rod as mechanical acoustic filter for enhancing nonlinear ultrasonic detection APL Materials, 9 (6). ISSN 2166-532X

Puthiyaveettil, Nithin ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2021) Influence of absorptivity of the material surface in crack detection using laser spot thermography NDT & E International, 120 . p. 102438. ISSN 0963-8695

Reddy, Sri Harsha K. ; Vasudevan, Achuth ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2021) Scattering of Higher Order Mode Clusters (HOMC) from surface breaking notches in plates with application to higher temperature gradients NDT & E International, 120 . p. 102441. ISSN 0963-8695

Koodalil, Dileep ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2021) Bond stiffness estimation with shear horizontal guided waves generated using PPM-EMATs International Journal of Adhesion and Adhesives, 104 . p. 102761. ISSN 0143-7496

Puthiyaveettil, Nithin ; Renil Thomas, K. ; Myrach, Philipp ; Ziegler, Mathias ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2020) Defect detection in steel bars up to 600 °C using laser line thermography Infrared Physics & Technology, 111 . p. 103565. ISSN 1350-4495

Davis, Geo ; Balasubramanian, Krishnan ; Palanisamy, Suresh ; Nagarajah, Romesh ; Rajagopal, Prabhu (2020) Additively manufactured integrated slit mask for laser ultrasonic guided wave inspection The International Journal of Advanced Manufacturing Technology, 110 (5-6). pp. 1203-1217. ISSN 0268-3768

Koodalil, Dileep ; Barnoncel, David ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2020) Detection of interfacial weakness in a lap-shear joint using shear horizontal guided waves NDT & E International, 112 . p. 102248. ISSN 0963-8695

Puthiyaveettil, Nithin ; Renil Thomas, K ; Unnikrishnakurup, Sreedhar ; Prabhakar, K. V. Phani ; Padmanabham, G. ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2019) Numerical model and experimental validation for online monitoring of cold metal transfer joining of aluminium to galvanized steel The International Journal of Advanced Manufacturing Technology, 104 (9-12). pp. 4365-4375. ISSN 0268-3768

Syed Akbar Ali, Mohamed Subair ; Amireddy, Kiran Kumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2019) Characterization of deep sub-wavelength sized horizontal cracks using holey-structured metamaterials Transactions of the Indian Institute of Metals, 72 (11). pp. 2917-2921. ISSN 0972-2815

Davis, Geo ; Nagarajah, Romesh ; Palanisamy, Suresh ; Rashid, Rizwan Abdul Rahman ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2019) Laser ultrasonic inspection of additive manufactured components The International Journal of Advanced Manufacturing Technology, 102 (5-8). pp. 2571-2579. ISSN 0268-3768

Panda, Rabi Sankar ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2018) Rapid guided wave inspection of complex stiffened composite structural components using non-contact air-coupled ultrasound Composite Structures, 206 . pp. 247-260. ISSN 0263-8223

Ray, Pabitro ; Srinivasan, Balaji ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2018) Monitoring pipe wall integrity using fiber Bragg grating-based sensing of low-frequency guided ultrasonic waves Ultrasonics, 90 . pp. 120-124. ISSN 0041-624X

Amireddy, Kiran Kumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2018) Porous metamaterials for deep sub-wavelength ultrasonic imaging Applied Physics Letters, 113 (12). ISSN 0003-6951

Antony Jacob, Ashish ; Balasubramanian, Krishnan ; Rajagopal, Prabhu ; Jeyaseelan, Antony ; Dutta, Soma ; Kumar, Anish ; Rao, B. Purnachandra ; Tammana, Jayakumar (2018) Ultrasonic transducers based on spray coated PZT film for in situ operation for temperatures up to 200 °C ISSS Journal of Micro and Smart Systems, 7 (1). pp. 25-34. ISSN 2509-7989

Syed Akbar Ali, Mohamed Subair ; Kumar, Anish ; Rao, Purnachandra B. ; Tammana, Jayakumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2018) Bayesian synthesis for simulation-based generation of probability of detection (PoD) curves Ultrasonics, 84 . pp. 210-222. ISSN 0041-624X

Vimalan, Deepesh ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2017) Reflection and mode conversion of fundamental torsional guided wave mode from lack of bonding in induction pressure welding Journal of Pressure Vessel Technology, 139 (6). ISSN 0094-9930

Amireddy, Kiran Kumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2017) Deep subwavelength ultrasonic imaging using optimized holey structured metamaterials Scientific Reports, 7 (1). ISSN 2045-2322

Periyannan, Suresh ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2017) Multiple temperature sensors embedded in an ultrasonic "spiral-like" waveguide AIP Advances, 7 (3). ISSN 2158-3226

Periyannan, Suresh ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2017) Ultrasonic bent waveguides approach for distributed temperature measurement Ultrasonics, 74 . pp. 211-220. ISSN 0041-624X

Thomas, K. Renil ; Unnikrishnakurup, Sreedhar ; Nithin, P. V. ; Balasubramanian, Krishnan ; Rajagopal, Prabhu ; Prabhakar, K. V. Phani ; Padmanabham, G. ; Riedel, Frank ; Puschmann, Markus (2016) Online monitoring of cold metal transfer (CMT) process using infrared thermography Quantitative InfraRed Thermography Journal, 14 (1). pp. 68-78. ISSN 1768-6733

Ray, Pabitro ; Rajagopal, Prabhu ; Srinivasan, Balaji ; Balasubramanian, Krishnan (2016) Feature-guided wave-based health monitoring of bent plates using fiber Bragg gratings Journal of Intelligent Material Systems and Structures, 28 (9). pp. 1211-1220. ISSN 1045-389X

Manogharan, Prabhakaran ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2016) Longitudinal guided waves confined in radius filler regions of composite joints The Journal of the Acoustical Society of America, 140 (1). pp. 334-343. ISSN 0001-4966

Periyannan, Suresh ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2016) Torsional mode ultrasonic helical waveguide sensor for re-configurable temperature measurement AIP Advances, 6 (6). ISSN 2158-3226

Amireddy, Kiran Kumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2016) Holey-structured metamaterial lens for subwavelength resolution in ultrasonic characterization of metallic components Applied Physics Letters, 108 (22). ISSN 0003-6951

Periyannan, Suresh ; Rajagopal, Prabhu ; Balasubramanian, Krishnan (2016) Re-configurable multi-level temperature sensing by ultrasonic “spring-like” helical waveguide Journal of Applied Physics, 119 (14). ISSN 0021-8979

Harish, Achar V ; Ray, Pabitro ; Rajagopal, Prabhu ; Balasubramanian, Krishnan ; Srinivasan, Balaji (2016) Detection of fundamental shear horizontal mode in plates using fibre Bragg gratings Journal of Intelligent Material Systems and Structures, 27 (16). pp. 2229-2236. ISSN 1045-389X

Pattanayak, Roson Kumar ; Manogharan, Prabhakaran ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2015) Low frequency axisymmetric longitudinal guided waves in eccentric annular cylinders The Journal of the Acoustical Society of America, 137 (6). pp. 3253-3262. ISSN 0001-4966

Ramdhas, Abilasha ; Pattanayak, Roson Kumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2015) Symmetric low-frequency feature-guided ultrasonic waves in thin plates with transverse bends Ultrasonics, 56 . pp. 232-242. ISSN 0041-624X

Verma, Bhupesh ; Mishra, Tarun Kumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2014) Interaction of low-frequency axisymmetric ultrasonic guided waves with bends in pipes of arbitrary bend angle and general bend radius Ultrasonics, 54 (3). pp. 801-808. ISSN 0041-624X

Ramdhas, Abilasha ; Pattanayak, Roson Kumar ; Balasubramanian, Krishnan ; Rajagopal, Prabhu (2013) Antisymmetric feature-guided ultrasonic waves in thin plates with small radius transverse bends from low-frequency symmetric axial excitation The Journal of the Acoustical Society of America, 134 (3). pp. 1886-1898. ISSN 0001-4966

Rajagopal, Prabhu ; Balasubramanian, Krishnan ; Maddu, Shankar ; Krishnamurthy, C.V. (2005) A new approach to inversion of surface wave dispersion relation for determination of depth distribution of non-uniform stresses in elastic materials International Journal of Solids and Structures, 42 (3-4). pp. 789-803. ISSN 0020-7683