Results 21 to 30 of about 67,775 (286)
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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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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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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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.
openaire +2 more sources
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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Applied Sciences, 2022 Defects are a leading issue for the rejection of parts manufactured through the Directed Energy Deposition (DED) Additive Manufacturing (AM) process. In an attempt to illuminate and advance in situ quality monitoring and control of workpieces, we present
Steven Hespeler +4 more
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A Reconstruction Procedure for Microwave Nondestructive Evaluation based on a Numerically Computed Green's Function [PDF]
, 2003 This paper describes a new microwave diagnostic tool for nondestructive evaluation. The approach, developed in the spatial domain, is based on the numerical computation of the inhomogeneous Green’s function in order to fully exploit all the available a ...
Caorsi, Salvatore +4 more
core +4 more sources
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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Nondestructive Evaluation of Special Defects Based on Ultrasound Metasurface
Frontiers in Materials, 2022 We demonstrate the nondestructive evaluation by means of directional ultrasound emitted from a planar metasurface. The ultrasound metasurface is designed to generate the collimated and directional ultrasound efficiently in a planar configuration, which ...
Hualiang Zhao +6 more
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