Search Results - "Popovics, John S"

NDE application of ultrasonic tomography to a full-scale concrete structure by Hajin Choi, Popovics, John S.

“…Newly developed ultrasonic imaging technology for large concrete elements, based on tomographic reconstruction, is presented. The developed 3-D internal images…”
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Application of Micro-Electro-Mechanical Sensors Contactless NDT of Concrete Structures by Ham, Suyun, Popovics, John S

“…The utility of micro-electro-mechanical sensors (MEMS) for application in air-coupled (contactless or noncontact) sensing to concrete nondestructive testing…”
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Comparison of NDT Methods for Assessment of a Concrete Bridge Deck by Oh, Taekeun, Kee, Seong-Hoon, Arndt, Ralf W, Popovics, John S, Zhu, Jinying

“…AbstractThe field application of three different nondestructive tests (NDTs)—air-coupled impact echo (IE), infrared (IR) thermography, and sounding (chain…”
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Imaging Concrete Structures Using Air-Coupled Impact-Echo by Zhu, Jinying, Popovics, John S

“…In this paper, air-coupled impact-echo is successfully applied for nondestructive evaluation of concrete. The air-coupled sensor is a small ( 6.3 mm diameter)…”
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Lamb Wave Basis for Impact-Echo Method Analysis by Gibson, Alexander, Popovics, John S

“…The impact-echo method has been developed over the past 20 years and is now widely used in the nondestructive evaluation of concrete. However, some practical…”
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Contactless Ultrasonic Wavefield Imaging to Visualize Near-Surface Damage in Concrete Elements by Song, Homin, Popovics, John S.

“…We present work to detect and visualize near-surface damage in concrete using contactless ultrasonic wavefield imaging technology. A fully contactless…”
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Surface-Wave Based Model for Estimation of Discontinuity Depth in Concrete by Ahn, Eunjong, Kim, Hyunjun, Sim, Sung-Han, Shin, Sung Woo, Popovics, John S, Shin, Myoungsu

“…In this paper, we propose an accurate and practical model for the estimation of surface-breaking discontinuity (i.e., crack) depth in concrete through…”
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Silicon ion radiation as a viable surrogate for emulating neutron radiation damage in silicates by Polavaram, Krishna C., Evani, Sai Kalyan, Drewry, Sean M., Rodriguez, Elena Tajuelo, Alnaggar, Mohammed G., Wetteland, Christopher J., Page, Katharine, Popovics, John S., Sickafus, Kurt E., Le Pape, Yann, Garg, Nishant

“…Nuclear power plants are aging around the world, and a precise assessment of irradiation damage in their components is needed. One key component, concrete, and…”
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Improved Interpretation of Vibration Responses from Concrete Delamination Defects Using Air-Coupled Impact Resonance Tests by Oh, Taekeun, Popovics, John S, Ham, Suyun, Shin, Sung Woo

“…AbstractThe deteriorating national infrastructure demands improved nondestructive evaluation (NDE) and structural health monitoring methods for existing…”
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Leaky rayleigh and scholte waves at the fluid-solid interface subjected to transient point loading by JINYING ZHU, POPOVICS, John S, SCHUBERT, Frank

“…The analysis of acoustic waves generated by a transient normal point load applied on a fluid–solid interface is presented. The closed-form exact solution of…”
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Air-coupled ultrasonic diffuse-wave techniques to evaluate distributed cracking damage in concrete by Ahn, Eunjong, Shin, Myoungsu, Popovics, John S.

“…•Diffuse-wave signals using air-coupled receiver shows acceptable SNRs, to evaluate micro-cracking damage in concrete.•Even maintaining the same reliability,…”
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Effectiveness of diffuse ultrasound for evaluation of micro-cracking damage in concrete by Ahn, Eunjong, Shin, Myoungsu, Popovics, John S., Weaver, Richard L.

“…The main objective of this research is to investigate the applicability of diffuse ultrasound to the evaluation of distributed micro-cracking damage in…”
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Extracting non-propagating oscillatory fields in concrete to detect distributed cracking by Song, Homin, Popovics, John S.

“…Work to detect and locate distributed subsurface cracks in concrete by extracting non-propagating oscillatory fields is presented. The medium of interest is…”
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The Potential for Material Property Characterization Using Physics-Informed Neural Networks and Ultrasonic Wave Data by Lee, Sangmin, Popovics, John S.

“…There is a need for reliable nondestructive test methods that can collect data from structural members and analyze the results in a rapid and efficient manner…”
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Integrated visualization for reinforced concrete using ultrasonic tomography and image-based 3-D reconstruction by Choi, Hajin, Ham, Youngjib, Popovics, John S.

“…•Contactless system provides high quality signal data and enable rapid data collection.•Ultrasonic tomograms detect embedded defects with high volumes of steel…”
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Application of contactless ultrasound toward automated inspection of concrete structures by Ham, Suyun, Popovics, John S.

“…In this paper we demonstrate the potential of contactless ultrasonic sensing for rapid and automated characterization of concrete structures. Practical…”
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A contactless ultrasonic surface wave approach to characterize distributed cracking damage in concrete by Ham, Suyun, Song, Homin, Oelze, Michael L., Popovics, John S.

“…•Sub-wavelength sized defects are characterized using ultrasonic backscatter data.•Most backscatter comes from cracking located in front of the ultrasonic…”
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Measurement of surface wave transmission coefficient across surface-breaking cracks and notches in concrete by Song, Won-Joon, Popovics, John S, Aldrin, John C, Shah, Surendra P

“…In this paper, a technique for measuring a surface wave transmission coefficient across surface-breaking cracks and notches in a heterogeneous but globally…”
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Analytical study of excitation and measurement of fluid-solid interface waves by Zhu, Jinying, Popovics, John S.

“…Analytical analyses are performed to investigate the pressure and particle velocity responses in fluid/solid half spaces subject to impulsive sources. This…”
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Dynamic behavior of a zero-group velocity guided mode in rail structures by Wu, Yuning, Zhang, Keping, Zhang, Peng, Zhu, Xuan, Popovics, John S.

“…Important characteristics of a zero-group velocity (ZGV) mode in a standard rail are investigated through numerical simulation and experiment. First, the…”
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