Results 21 to 30 of about 68,383 (304)
Nondestructive evaluation [PDF]
, 1997 Research reported in the thrust area of nondestructive evaluation includes: advanced 3-D imaging technologies; new techniques in laser ultrasonic testing; infrared computed tomography for thermal NDE of materials, structures, sources, and processes; automated defect detection for large laser optics; multistatic micropower impulse radar imaging for ...
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Numerical study of beam shape adaptation by anisotropic disk covering transducer or metamaterial
Acta Acustica, 2023 Metamaterials are intensely explored for their capabilities to modify sound beams. In addition to frequency filtering, acoustic lenses offer intriguing possibilities for shaping sound beams.
Declercq Nico F.
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IEEE Open Journal of Instrumentation and Measurementadditive manufacturing (AM) or 3-D printing is the process of rapidly manufacturing complex parts that are used in a wide range of applications encompassing nearly unlimited types of critical and noncritical components.
Reza Zoughi +2 more
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AIP Advances, 2021 This paper proposes a novel design for a hermetically sealable device, consisting of charged linear and nonlinear membranes driven in the gigahertz range in vacuum setting, as a source of antibunched single phonons.
Jayant K. Nema +3 more
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Passive Thermography Measurement of Damage Depth During Composites Load Testing
Frontiers in Mechanical Engineering, 2021 Passive thermography is commonly used for composites load testing to detect damage formation as a function of the applied load. The advantages of passive thermography are real time implementation, large area coverage, and noncontact measurement.
Joseph N. Zalameda, William P. Winfree
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Nondestructive evaluations [PDF]
, 1993 This report discusses Nondestructive Evaluation (NDE) thrust area which supports initiatives that advance inspection science and technology. The goal of the NDE thrust area is to provide cutting-edge technologies that have promise of inspection tools three to five years in the future.
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IEEE Open Journal of Instrumentation and MeasurementThis study presents the results of using a millimeter-wave reflectometer system, operating at 150 GHz, for demonstrating the basic efficacy of measuring electromagnetic scattering of metal powder used in laser powder bed fusion (LPBF) additive ...
Farzaneh Ahmadi, Reza Zoughi
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Vibration-Based Approach to Measure Rail Stress: Modeling and First Field Test
Sensors, 2022 This paper describes a non-invasive inspection technique for the estimation of longitudinal stress in continuous welded rails (CWR) to infer the rail neutral temperature (RNT), i.e., the temperature at which the net longitudinal force in the rail is zero.
Matthew Belding +2 more
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Electromagnetic imaging methods for nondestructive evaluation applications. [PDF]
Sensors (Basel), 2011 Deng Y, Liu X.
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Lensing in the Ultrasonic Domain using Negative Refraction Induced by Material Contrast
Scientific Reports, 2019 The focusing of ultrasound using topographic lenses, typically made of plates with step changes that cause an interaction between forward- and backward-propagating guided waves, has been widely studied in recent years.
C. T. Manjunath, Prabhu Rajagopal
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