Lamb Wave Based Experimental and Finite Element Simulation Studies for Damage Detection in an Aluminium and a Composite Plate using Geodesic Algorithm

Structural health monitoring (SHM) is an emerging research area with multiple applications. Lamb waves are ultrasonic elastic waves that travel inside and along thin plates and is frequently used as diagnostic tools to detect damage in plate-like structures. In this paper, a transient dynamic finite element simulation of Lamb wave with piezoelectric transducers for damage detection in a composite plate is carried out. The embedded cross-shaped piezoelectric active sensor arrays were used to generate and receive guided Lamb waves propagating in the plate structure. A full-scale FEM model for the laminate was created using three-dimensional eight-node layered structural solid element and piezoelectric active sensors were created using coupled field elements on the commercial finite element code ANSYS platform. The beam forming technique of Lamb waves is used to locate damage in the plate .The results of the numerical simulation demonstrate the effectiveness of the approach.

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Longitudinal Crack Damage Detection in a Beam Structure Using Lamb Wave Based Finite Element Simulation

58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference ◽

10.2514/6.2017-0862 ◽

2017 ◽

Cited By ~ 1

Author(s):

Chan Yik Park ◽

Anthony N. Palazotto ◽

Chad S. Hale

Keyword(s):

Finite Element ◽

Damage Detection ◽

Finite Element Simulation ◽

Lamb Wave ◽

Longitudinal Crack ◽

Beam Structure ◽

Element Simulation

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Finite Element Simulation of Damage Detection of Stiffened Plate under Temperature Variation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.230-232.75 ◽

2011 ◽

Vol 230-232 ◽

pp. 75-79

Author(s):

Wen Zhong Qu ◽

Li Xiao

Keyword(s):

Finite Element ◽

Damage Detection ◽

Finite Element Simulation ◽

Lamb Wave ◽

Elevated Temperatures ◽

Lamb Waves ◽

Thin Plates ◽

Diagnostic Tools ◽

Stiffened Plate ◽

Element Simulation

Lamb waves are ultrasonic elastic waves that travel inside and along thin plates and is frequently used as diagnostic tools to detect damage in plate-like structures. In this paper, a transient dynamic finite element simulation of Lamb wave with piezoelectric transducers for damage detection in a stiffened plate under different temperature condition is carried out on the commercial finite element code ANSYS platform. Simulations are conducted over a temperature range. The changes in temperature-dependent material properties are used to measure the differences in the response signal’s waveform. The baseline selection method and baseline signal stretch method are used to compensate the temperature influence on Lamb wave propagation. The results of the numerical simulation demonstrate the effectiveness of the temperature compensation approach and the simulated damage on the stiffened plate can be defected effectively under elevated temperatures environment.

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