scholarly journals An Experimental Study of Crack Detection in Annular Components by Ultrasonic Guided Waves

1998 ◽  
pp. 193-200 ◽  
Author(s):  
Zongbao Li ◽  
Yves H. Berthelot
Keyword(s):  
Experimental Study ◽  
Crack Detection ◽  
Guided Waves ◽  
Ultrasonic Guided Waves

Fatigue crack detection under the vibration condition based on ultrasonic guided waves

2019 ◽  
pp. 147592171986077 ◽  
Author(s):  
Yanping Zhu ◽  
Fucai Li ◽  
Wenjie Bao
Keyword(s):  
Fatigue Crack ◽  
Crack Detection ◽  
Guided Waves ◽  
Fatigue Testing ◽  
Ultrasonic Guided Waves ◽  
Testing Platform ◽  
Vibration Condition ◽  
Fatigue Crack Detection ◽  
The Difference ◽  
Index Value

Ultrasonic guided wave is an encouraging tool in structural health monitoring for civil, mechanical, ship, and aerospace devices. Most of heavy devices required a long-time running during the service, and the structure of these devices is under the vibration condition due to their inherent properties and working condition. This article mainly researches fatigue crack detection in vibration condition caused by operation using ultrasonic guided waves, aiming to study the application of ultrasonic guided waves in the field of structure dynamics. The detection method based on the difference index and the sequence curve of difference index between different states of crack is proposed to detect fatigue crack in vibration condition. The experiments are carried out on the fatigue testing platform and the vibration test-bed to investigate the relationship between opening states of fatigue crack and the difference index value of ultrasonic guided waves. In order to reduce the influence of loads applied by the fatigue testing platform on ultrasonic guided waves propagation, the initial experiment is first carried out to select the range of applied loads which have minimal influence on wave propagation. The results show that loads from 0 to 24 MPa have minimal effect on ultrasonic guided waves, and the difference index values of intact beam and cracked beam are in different orders of magnitude. Therefore, the method based on difference index value and sequence of difference index is credible to detect fatigue crack for structure in vibration condition.

Multiple Crack Detection of Pipes Using PZT-Based Guided Waves

2013 ◽  
Vol 448-453 ◽  
pp. 3702-3708 ◽  
Author(s):  
Shi Yan ◽  
Ji Qi ◽  
Nai Zhi Zhao ◽  
Yang Cheng ◽  
Sheng Wen Jun Qi
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Numerical Model ◽  
Crack Detection ◽  
Guided Waves ◽  
Arrival Time ◽  
Ultrasonic Guided Waves ◽  
Multiple Crack ◽  
Finite Element Software ◽  
Reflected Signal

This paper focuses on the multiple crack detection of steel pipelines using PZT-based guided waves. Numerical simulations of cracked pipes based on ultrasonic guided-waves are conducted by using the ANSYS finite element software. Based on the analysis of the reflected signal, the arrival time of the crack reflection waves are determined and the crack positions are accurately evaluated by the calculation of the travel time and group velocity of the PZT-based guided waves. The crack parameters are numerically altered to determine how the parameters impact the sensitive degree of the pipe crack damage. To validate the efficiency of the numerical simulation, an experiment of the multiple crack detection for the same parameter pipe with the numerical model is performed in the laboratory, and the results match well with the numerical simulation.

Crack detection in thick annular components using ultrasonic guided waves

2000 ◽  
Vol 214 (9) ◽  
pp. 1163-1171 ◽  
Author(s):  
J Qu ◽  
Y. H. Berthelot ◽  
L. J. Jacobs
Keyword(s):  
Crack Detection ◽  
Guided Waves ◽  
Numerical Solutions ◽  
Ultrasonic Inspection ◽  
Guided Wave ◽  
Ultrasonic Guided Waves ◽  
Time Harmonic ◽  
Solution Methods ◽  
Wave Technique ◽  
Steady State Time

This paper provides an overview of a study on circumferential guided waves in a thick annulus. Both steady state, time-harmonic waves and transient waves are considered. Several solution methods are reviewed and numerical solutions are presented for the propagation of ultrasonic circumferential waves in a thick, curved, two-dimensional annular waveguide. The modal content of the signal and the displacement profiles across the wall thickness are investigated. These studies provide valuable guidance in selecting optimal parameters for use in applications of the guided wave technique to the detection of cracks on the inner surface of annular components. Experimental results show that the technique can be used on parts with complex geometries (e. g. the pitch shaft of a helicopter) to detect cracks that would not be detectable by standard ultrasonic inspection.

Effect of Pipe Bend Configuration on Guided Waves-Based Defects Detection: An Experimental Study

2015 ◽  
Vol 138 (2) ◽  
Author(s):  
Jing Ni ◽  
Shaoping Zhou ◽  
Pugen Zhang ◽  
Yong Li
Keyword(s):  
Experimental Study ◽  
Defect Detection ◽  
Guided Waves ◽  
Fe Simulation ◽  
Ultrasonic Guided Waves ◽  
Detection Sensitivity ◽  
Pipe Bend ◽  
Simulation And Experiment ◽  
Testing Techniques ◽  
Waves Propagation

Ultrasonic guided waves is one of the most effective nondestructive testing techniques, which has been successfully applied for damage detection and evaluation of piping components. However, research about defects detection for pipelines with multiple bends is still limited. In this paper, effect of pipe bend arrangement on guided waves-based defect detection is investigated by experimental method, in which different configurations including space-Z type, U type, and plane-Z type are considered, respectively. Finite element (FE) simulation is used to explore the propagation behaviors of axisymmetric L (0, 2) mode in different bend configurations. On this basis, the detection sensitivity for different crack locations is experimentally investigated. Simulation and experiment results reveal that feature of guided waves propagation across the first and the second bend is totally different, and the defect detection sensitivity in the second bend is different from that in the first bend.

ULTRASONIC GUIDED WAVES FOR THE INSPECTION OF ADHESIVELY BONDED JOINTS

2008 ◽  
Author(s):  
Padma Kumar Puthillath ◽  
Fei Yan ◽  
Clifford J. Lissenden ◽  
Joseph L. Rose ◽  
Donald O. Thompson ◽  
...  
Keyword(s):  
Guided Waves ◽  
Ultrasonic Guided Waves ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints
Sign in / Sign up

Export Citation Format

Share Document