scholarly journals DETECTION OF INNER FATIGUE CRACK IN WELDING BETWEEN STEEL DECK PLATE AND TROUGH RIB BY PHASED ARRAY NON-DESTRUCTIVE TESTING

2016 ◽  
Vol 72 (3) ◽  
pp. 393-406 ◽  
Author(s):  
Naoto YAGI ◽  
Toshimitsu SUZUKI ◽  
Noboru WAKABAYASHI ◽  
Masumi MURANO ◽  
Chitoshi MIKI
Keyword(s):  
Fatigue Crack ◽  
Phased Array ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Deck Plate ◽  
Non Destructive ◽  
Steel Deck

scholarly journals Plane Wave Imaging through Interfaces

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 4967
Author(s):  
Guillermo Cosarinsky ◽  
Jorge F. Cruza ◽  
Jorge Camacho
Keyword(s):  
Image Quality ◽  
Plane Wave ◽  
Phased Array ◽  
Mathematical Formulation ◽  
Non Destructive Testing ◽  
Arbitrary Geometry ◽  
Destructive Testing ◽  
Wave Imaging ◽  
Imaging Strategy ◽  
Non Destructive

Plane Wave Imaging (PWI) has been recently proposed for fast ultrasound inspections in the Non-Destructive-Testing (NDT) field. By using a single (or a reduced number) of plane wave emissions and parallel beamforming in reception, frame rates of hundreds to thousands of images per second can be achieved without significant image quality losses with regard to the Total Focusing Method (TFM) or Phased Array (PA). This work addresses the problem of applying PWI in the presence of arbitrarily shaped interfaces, which is a common problem in NDT. First, the mathematical formulation for generating a plane wave inside a component of arbitrary geometry is given, and the characteristics of the resultant acoustic field are analyzed by simulation, showing plane wavefronts with non-uniform amplitude. Then, an imaging strategy is proposed, accounting for this amplitude effect. Finally, the proposed method is experimentally validated, and its application limits are discussed.

scholarly journals Experiment-Based Fatigue Behaviors and Damage Detection Study of Headed Shear Studs in Steel–Concrete Composite Beams

2021 ◽  
Vol 11 (18) ◽  
pp. 8297
Author(s):  
Jun Xu ◽  
Huahuai Sun ◽  
Weizhen Chen ◽  
Xuan Guo
Keyword(s):  
Fatigue Crack ◽  
Fatigue Damage ◽  
Fatigue Failure ◽  
Failure Modes ◽  
Fatigue Loading ◽  
Composite Beams ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive ◽  
Push Out

Many in-service bridges with steel–concrete composite beams are currently aging and experiencing performance deterioration. Under long-term cyclic loads from traffic on bridges, headed shear studs in steel–concrete composite beams are vulnerable to fatigue damage. The comprehensive understanding of fatigue behaviors and the feasible detection of fatigue damage of headed shear studs is, thus, crucial for the accurate numerical simulation of the fatigue crack propagation process. The paper, thus, experimentally investigates the fatigue behaviors of headed shear studs through push-out tests of three specimens. The fatigue failure modes and cyclic strain evolution of specimens are analyzed. The fatigue lives of headed shear studs are compared with the S–N curves of the AASHTO, Eurocode 4 and BS5400 codes. The fatigue crack details of shear studs in push-out tests are then detected using the ultrasonic non-destructive testing. The results show that the root fracture is the main fatigue failure mode of shear studs under fatigue loading. The fatigue life estimations based on the three current codes (i.e., AASHTO, Eurocode 4 and BS5400) can be safely guaranteed only with different safety redundancies. The strain at the shear stud with fatigue damage shows a consistent increasing trend followed by decreasing behavior after reaching the peak value with the loading cycles. Moreover, the feasibility of the ultrasonic non-destructive testing with the combination of a strain measurement for fatigue crack details detection of headed shear studs in composite beams is proved.

Sign in / Sign up

Export Citation Format

Share Document