Results 31 to 40 of about 969,779 (317)

Multi-Dimensional Uniform Initialization Gaussian Mixture Model for Spar Crack Quantification under Uncertainty

Sensors, 2021
Guided Wave (GW)-based crack monitoring method as a promising method has been widely studied, as this method is sensitive to small cracks and can cover a wide monitoring range.
Qiuhui Xu, Shenfang Yuan, Tianxiang Huang   +2 more
doaj   +1 more source

Influence of Compaction Level on the Water-Heat-Vapor Characteristics of Unsaturated Coarse-Grained Fillings Exposed to Freezing and Thawing

Advances in Civil Engineering, 2020
Compaction level is an important control index to guarantee subgrade stability. Under freezing-thawing cycles, water-heat-vapor characteristics due to different compaction levels of unsaturated coarse-grained fillings of high-speed railway (HSR) subgrade
Yuzhi Zhang, An Wen, Weigang Zhao, Xiaojie Liang, Pei Li   +4 more
doaj   +1 more source

Acoustic Emission Monitoring of Fatigue Crack Growth in Mooring Chains

Applied Sciences, 2019
Offshore installations are subject to perpetual fatigue loading and are usually very hard to inspect. Close visual inspection from the turret is usually too hazardous for divers and is not possible with remotely operated vehicles (ROVs) because of the ...
Ángela Angulo, Jialin Tang, Ali Khadimallah, Slim Soua, Cristinel Mares, Tat-Hean Gan   +5 more
doaj   +1 more source

Guided Wave Characteristic Research and Probabilistic Crack Evaluation in Complex Multi-Layer Stringer Splice Joint Structure

Sensors, 2023
Multi-layer and multi-rivet connection structures are critical components in the structural integrity of a commercial aircraft, in which elements like skin, splice plate, strengthen patch, and stringer are fastened together layer by layer with multiple ...
Jian Chen, Yusen Xu, Shenfang Yuan, Zhen Qin   +3 more
doaj   +1 more source

High Precision, Small Size and Flexible FBG Strain Sensor for Slope Model Monitoring

Sensors, 2019
In this paper, a soft fiber Bragg grating (FBG) strain sensor was constructed of a rubber strip, FBGs and steel plates, which exhibits the advantages of high precision and a small size.
Hongbin Xu, Xinyu Zheng, Weigang Zhao, Xu Sun, Feng Li, Yanliang Du, Bo Liu, Yang Gao   +7 more
doaj   +1 more source

Fatigue Crack Evaluation with the Guided Wave–Convolutional Neural Network Ensemble and Differential Wavelet Spectrogram

Sensors, 2021
On-line fatigue crack evaluation is crucial for ensuring the structural safety and reducing the maintenance costs of safety-critical systems. Among structural health monitoring (SHM), guided wave (GW)-based SHM has been deemed as one of the most ...
Jian Chen, Wenyang Wu, Yuanqiang Ren, Shenfang Yuan   +3 more
doaj   +1 more source

Experimental Study of Damage Development in Salt Rock under Uniaxial Stress Using Ultrasonic Velocity and Acoustic Emissions

Applied Sciences, 2018
Ultrasonic waves and acoustic emissions (AE) are important technologies to reveal rock damage. However, few studies have simultaneously monitored both types of data in the same experiment because of limitations on the experimental apparatus.
Haoran Li, Zhikai Dong, Yun Yang, Bo Liu, Mingyi Chen, Wenjun Jing   +5 more
doaj   +1 more source

Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures

Rock and Soil Mechanics, 2021
In order to reveal the fracture development and damage evolution law of marble under the influence of temperature, the deformation and failure characteristics and acoustic emission activity of marble under the conditions of 30, 60, 90, 120 ℃ and 150 ...
LI Hao-ran, WANG Zi-heng, MENG Shi-rong, ZHAO Wei-gang, CHEN Feng   +4 more
doaj   +1 more source

Fourier Series Approach for the Vibration of Euler–Bernoulli Beam under Moving Distributed Force: Application to Train Gust

Shock and Vibration, 2019
The dynamic response of an Euler–Bernoulli beam under moving distributed force is studied. By decomposing the distributed force into Fourier series and extending them to semi-infinite sine waves, the complex procedure for solving this problem is ...
Shupeng Wang, Weigang Zhao, Guangyuan Zhang, Feng Li, Yanliang Du   +4 more
doaj   +1 more source

A Methodological Framework for Structural Reliability Assessment of Marine Structural Elements

Journal of Marine Science and Engineering, 2023
The aim of this paper is to provide a robust framework to assist researchers in deciding which methods to use, depending on the problem at hand, in order to estimate the probability of failure of marine structural parts that are subjected to variable ...
Vaso Mantzakopoulou, Konstantinos Anyfantis   +1 more
doaj   +1 more source