scholarly journals Development of Fatigue Crack Monitoring System.

1996 ◽  
Vol 45 (1) ◽  
pp. 79-84 ◽  
Author(s):  
Kengo MORINO ◽  
Chiaki HIWA ◽  
Yasushi IKAI
Keyword(s):  
Fatigue Crack ◽  
Monitoring System ◽  
Crack Monitoring

Continuous fatigue crack monitoring of bridges: Long-Term Electrochemical Fatigue Sensor (LTEFS)

2016 ◽  
Author(s):  
Monty A. Moshier ◽  
Levi Nelson ◽  
Ryan Brinkerhoff ◽  
Marybeth Miceli
Keyword(s):  
Fatigue Crack ◽  
Crack Monitoring ◽  
Fatigue Sensor

A Novel Fatigue Crack Monitoring Method Based on Nonlinear Dynamic Characteristics of Strain

2019 ◽  
Vol 20 (01) ◽  
pp. 2050016
Author(s):  
Dong Yang ◽  
Dan Li ◽  
K. S. C. Kuang
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Crack Propagation ◽  
Real Time ◽  
Nonlinear Dynamic ◽  
Crack Opening ◽  
Steel Structures ◽  
Monitoring Method ◽  
Strain Measurements ◽  
Crack Monitoring

This paper presents a novel fatigue crack monitoring method for steel specimens based on the smoothness priors method (SPM) and Tsallis entropy (TE) of strain measurements. The aim of the study is to detect initiation of a crack in steel specimens and subsequently to monitor its propagation under the fatigue load, based on real-time strain measurements. The nonlinear dynamic response of the structure was exploited since it degrades due to the initiation and subsequent propagation of the crack under the external dynamic excitation. The proposed method was experimentally validated. Here, the SPM is applied to decomposing the structural strain response into a nearly-stationary (NS) component and a low frequency aperiodic trend (LFAT) component. Features associated with crack initiation can be extracted from the NS component. The LFAT component, on the other hand, can be used to identify crack propagation. To tackle the singularity of the structural responses associated with a crack, the TE of the NS component was used in detection and monitoring of the crack in the steel specimen. Two other techniques, namely, acoustic emission (AE) sensor and crack opening displacement (COD) gauge were used for the purpose of calibration and comparison. The results show remarkable resemblance in terms of crack initiation and propagation identification exhibited by all three types of sensors, highlighting the potential of the proposed method for real-time detection and subsequent monitoring of crack propagation in steel structures.

Crack Monitoring System for Soft Rock Mining Conveyor Belt Using UHF RFID Sensors

2021 ◽  
Vol 70 ◽  
pp. 1-12
Author(s):  
Omar Salim ◽  
Shuvashis Dey ◽  
Hossein Masoumi ◽  
Nemai Chandra Karmakar
Keyword(s):  
Monitoring System ◽  
Soft Rock ◽  
Conveyor Belt ◽  
Uhf Rfid ◽  
Crack Monitoring ◽  
Rock Mining

Chinese Turnout Crack Monitoring System of High-speed Railway

2015 ◽  
Author(s):  
PING WANG ◽  
JIELING XIAO ◽  
XI SHENG ◽  
DAYONG QIN
Keyword(s):  
Monitoring System ◽  
High Speed ◽  
High Speed Railway ◽  
Crack Monitoring
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