Results 31 to 40 of about 5,841,396 (302)

Study on Bond Defect Detection in Grouted Rock Bolt Systems under Pullout Loads

open access: yesAdvances in Materials Science and Engineering, 2022
In grouted rock bolt systems, bond defects often occur, which seriously affects the safety of rock mass structures. Therefore, in this study, based on the existence of bond defects, laboratory tests were conducted to detect the location and length of ...
Shuisheng Yu   +4 more
doaj   +1 more source

Axial Stress Measurement of Steel Tubes Using Ultrasonic Guided Waves

open access: yesSensors, 2022
Axially loaded steel tubes are widely used as primary structural members in civil engineering structures. In this paper, a stress measurement method for axially loaded steel tubes is developed based on the linear relationship between the group velocity ...
Siyuan Zhu   +3 more
doaj   +1 more source

Theoretical Analysis of Plasmonic Modes in a Symmetric Conductor–Gap–Dielectric Structure for Nanoscale Confinement

open access: yesIEEE Photonics Journal, 2014
A hybrid plasmonic waveguide is considered as one of the most promising architectures for long-range subwavelength guiding. The objective of this paper is to present a theoretical analysis of plasmonic guided modes in a symmetric conductor–gap ...
Li Wei   +3 more
doaj   +1 more source

Location Specific Temperature Compensation of Guided Wave Signals in Structural Health Monitoring

open access: yesIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2020
In guided wave structural health monitoring, defects are typically detected by identifying high residuals obtained through the baseline subtraction method, where an earlier measurement is subtracted from the “current” signal.
S. Mariani   +2 more
semanticscholar   +1 more source

Needle Tip Detection Using Ultrasound Probe for Vertical Punctures: A Simulation and Experimental Study

open access: yesDiagnostics, 2022
Current ultrasound-guided punctures are difficult to perform as they are performed at an angle to the ultrasound image of the affected area, resulting in longer puncture times, lower success rates, and higher unexpected injury rates.
Yuusuke Tanaka   +5 more
doaj   +1 more source

Application Research of Ultrasonic-Guided Wave Technology in Pipeline Corrosion Defect Detection: A Review

open access: yesCoatings
This paper presents research on the application of ultrasonic-guided wave technology in corrosion defect identification, expounds the relevant ultrasonic-guided wave theories and the principle of ultrasonic-guided wave non-destructive testing of ...
Feng Lyu   +4 more
semanticscholar   +1 more source

Compressed Sensing Method for Health Monitoring of Pipelines Based on Guided Wave Inspection

open access: yesIEEE Transactions on Instrumentation and Measurement, 2020
The pipeline in-service needs to be inspected in a certain period to master its structural health status. An ultrasonic guided wave, which can propagate along pipelines with less energy loss, provides an efficient method for long-term in situ inspection.
Zhe Wang   +5 more
semanticscholar   +1 more source

Guided Wave for plate inspection

open access: yese-Journal of Nondestructive Testing
Guided wave ultrasonic testing (GWT) for plate inspection presents a valuable non-destructive evaluation technique for monitoring large, inaccessible structural components such as petrochemical tank floors and dam penstock gates. Unlike traditional spot-
Hugo Hervé-côte, Sevan Bouchy
doaj   +1 more source

Amplitude Dispersion Compensation for Damage Detection Using Ultrasonic Guided Waves

open access: yesSensors, 2016
Besides the phase and group velocities, the amplitude of guided wave mode is also frequency dependent. This amplitude dispersion also influences the performance of guided wave methods in nondestructive evaluation (NDE) and structural health monitoring ...
Liang Zeng   +3 more
doaj   +1 more source

A New Approach to Guided Wave Ray Tomography for Temperature-Robust Damage Detection Using Piezoelectric Sensors

open access: yesSensors, 2018
In this paper, a new approach to guided wave ray tomography for temperature-robust damage detection with time-of-flight (TOF) temperature compensation is developed.
Dan Li   +5 more
doaj   +1 more source

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