Composite material defect characterization using leaky Lamb wave dispersion data

1998 ◽  
Author(s):  
Yoseph Bar-Cohen ◽  
Ajit K. Mal ◽  
Zensheu Chang
Keyword(s):  
Composite Material ◽  
Lamb Wave ◽  
Wave Dispersion ◽  
Defect Characterization ◽  
Dispersion Data ◽  
Leaky Lamb Wave

Calculating the full leaky Lamb wave dispersion characteristics

2019 ◽  
Vol 145 (3) ◽  
pp. 1791-1791
Author(s):  
Daniel A. Kiefer ◽  
Michael Ponschab ◽  
Stefan J. Rupitsch
Keyword(s):  
Lamb Wave ◽  
Wave Dispersion ◽  
Dispersion Characteristics ◽  
Leaky Lamb Wave

Research progress of acoustic emission detection technology based on modal theory

2020 ◽  
pp. 1-12
Author(s):  
Yan Liu
Keyword(s):  
Acoustic Emission ◽  
Composite Material ◽  
Lamb Wave ◽  
Experimental System ◽  
Wave Theory ◽  
Wave Dispersion ◽  
Research Progress ◽  
Detection Accuracy ◽  
Time Frequency ◽  
Detection Technology

The essence of modal acoustic emission theory is to study acoustic emission waves using Lamb wave theory. Different from the traditional acoustic emission research, the modal acoustic emission analyzes the entire waveform of the signal received by the sensor, distinguishes various modal waves in the composite material, and improves the detection accuracy of the composite material. At present, the research on acoustic emission technology of composite materials at home and abroad mainly focuses on five aspects of Lamb wave dispersion characteristics, finite element simulation of defect detection, experimental system design, time-frequency analysis of Lamb wave signal, damage location and damage imaging. From these five aspects, the research progress of the composite defect nondestructive testing technology is reviewed, and the problems to be further solved are put forward.

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