scholarly journals Detection on Fatigue Crack of Aluminum Alloy Plate Based on Modulation Nonlinear Lamb Waves and Time Reversal Method

2012 ◽  
Vol 29 ◽  
pp. 1373-1377 ◽  
Author(s):  
Guili Gao ◽  
Dayong Li ◽  
Dequan Shi ◽  
Jingwei Dong
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Crack ◽  
Time Reversal ◽  
Lamb Waves ◽  
Alloy Plate ◽  
Aluminum Alloy Plate

Numerical and experimental research on damage shape recognition of aluminum alloy plate based on Lamb wave

2021 ◽  
pp. 1045389X2199088
Author(s):  
Yaogang Wu ◽  
Xing Shen ◽  
Dinghe Li
Keyword(s):  
Aluminum Alloy ◽  
Lead Zirconate Titanate ◽  
Arrival Time ◽  
Lamb Waves ◽  
Shape Recognition ◽  
Mesh Size ◽  
Optimization Method ◽  
Alloy Plate ◽  
Aluminum Alloy Plate ◽  
Lagrangian Optimization

The structure health monitoring (SHM) system with Lamb waves technique is studied numerically and experimentally in this paper. A damage shape recognition algorithm (DSRA) is developed for the hole on aluminum alloy plate specimen. The proposed DSRA is established based on the two arrival time difference method (2/ATDM) and Lagrangian optimization method. This method captures the damage shape by describing the coordinates of the reflection point from the piezoelectric ceramic lead zirconate titanate (PZT) transducers to the damage edge. 2/ATDM provides a way to obtain coordinate points by the arrival time which is determined by Lamb waves. And the coordinate points are optimized by the Lagrangian optimization method. A numerical model is established to simulate the proposed experiment process. Its convergence rate of mesh size and time steps is investigated, and the numerical results are verified by these of experiment. Hence, the shape recognition of damage occurring at an arbitrary position and that of irregular damage are studied by the proposed numerical and experiment methods.

Investigation of Fatigue Growth Behavior of an Inclined Crack in Aluminum Alloy Plate

2018 ◽  
Vol 18 (5) ◽  
pp. 1159-1167 ◽  
Author(s):  
Jun Wang ◽  
Xing-Quan Zhang ◽  
Wei Wei ◽  
Jin-Yu Tong ◽  
Bin Chen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Growth Behavior ◽  
Inclined Crack ◽  
Alloy Plate ◽  
Aluminum Alloy Plate
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