Identification of Damage Using Lamb Waves
01 Jan 2009-
About: The article was published on 2009-01-01. It has received 592 citations till now. The article focuses on the topics: Lamb waves.
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TL;DR: In this paper, the authors experimentally tested three composite structures made of glass fiber-reinforced plastic, hybrid composite with a core made of the same material and face sheets made of aluminum alloy and a carbon fiber reinforced plastic structure extracted from the vertical stabilizer of a military aircraft.
247 citations
Cites background from "Identification of Damage Using Lamb..."
...In the literature there exists numerous DI examples [27,28]....
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...The idea of damage detection relies on comparison of the acquired signals for the initial and the damaged state of the structure [27,28]....
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TL;DR: In this article, a modified delay-and-sum algorithm is proposed for detecting impact damage in composite plates with and without a stiffener, which is shown to capture and localize damage with only four transducers.
Abstract: Piezoelectric sensors are increasingly being used in active structural health monitoring, due to their durability, light weight and low power consumption. In the present work damage detection and characterization methodologies based on Lamb waves have been evaluated for aircraft panels. The applicability of various proposed delay-and-sum algorithms on isotropic and composite stiffened panels have been investigated, both numerically and experimentally. A numerical model for ultrasonic wave propagation in composite laminates is proposed and compared to signals recorded from experiments. A modified delay-and-sum algorithm is then proposed for detecting impact damage in composite plates with and without a stiffener which is shown to capture and localize damage with only four transducers.
190 citations
TL;DR: In this article, a hybrid approach for characterizing fatigue damage was developed, using two genres of damage indices constructed based on the linear and the nonlinear features of acousto-ultrasonic waves.
147 citations
TL;DR: Higher order finite element methods with polynomial degrees p>2 are proposed and their capabilities are verified to verify their capabilities with respect to accuracy and numerical performance in Structural Health Monitoring applications.
147 citations
Cites background from "Identification of Damage Using Lamb..."
...The geometrical attenuation is only proportional to 1= ffiffi r p [7], where r is the travelled distance from the source....
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TL;DR: In this article, a methodology for impact identification on composite stiffened panels using piezoceramic sensors has been presented, where a large number of impacts covering a wide range of energies (corresponding to small and large mass impacts) at various locations of a composite stiffening panel have been simulated using the finite element (FE) method.
Abstract: In this work a methodology for impact identification on composite stiffened panels using piezoceramic sensors has been presented. A large number of impacts covering a wide range of energies (corresponding to small and large mass impacts) at various locations of a composite stiffened panel have been simulated using the finite element (FE) method. To predict the impact location, artificial neural networks have been established using the data generated from FE analyses. A number of sensor signal features have been examined as inputs to the neural network and the effect of noise on the predictions has been investigated. The results of the study show that the trained network is capable of locating impacts with different energies at different locations (e.g. in the bay, over/under the stringer and on the foot of the stringer) in a complicated structure such as a composite stiffened panel.
125 citations