scholarly journals Steel bridge fatigue crack detection with piezoelectric wafer active sensors

2010 ◽  
Author(s):  
Lingyu Yu ◽  
Victor Giurgiutiu ◽  
Paul Ziehl ◽  
Didem Ozevin ◽  
Patrick Pollock
Keyword(s):  
Fatigue Crack ◽  
Crack Detection ◽  
Steel Bridge ◽  
Active Sensors ◽  
Piezoelectric Wafer Active Sensors ◽  
Fatigue Crack Detection ◽  
Piezoelectric Wafer

Detection of Cracks Using Piezoelectric Wafer Active Sensors

2005 ◽  
Vol 293-294 ◽  
pp. 201-206
Author(s):  
Antoni Blazewicz ◽  
Andrei G. Kotousov ◽  
Frank Wornle
Keyword(s):  
Laboratory Tests ◽  
Crack Detection ◽  
Fatigue Loading ◽  
Structural Elements ◽  
Active Sensors ◽  
Sensor Applications ◽  
Piezoelectric Wafer Active Sensors ◽  
Piezoelectric Wafer ◽  
Pulse Echo ◽  
Pulse Echo Method

The capability of piezoelectric wafer active sensors to identifying cracks which are common to metallic structural elements subjected to fatigue loading were explored. A number of laboratory tests were performed to investigate Lamb wave transmission and reception characteristics as well as the sensitivity of the transmitted and reflected signals to the presence of a through-the-thickness crack of various length and orientation in a thin plate. Based on the laboratory tests an optimum strategy for crack detection with the pulse-echo method was investigated. The method can be used for large areas scanning with a small amount of sensors and is favoured for embedded and leave-in-place sensor applications.

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