On research of a phase synthesis time reversal focusing method for damage imaging of complex composite structures

Zixue, Qiu; Qiu, Lei; Jiang, Yuan; Guan, Lei

doi:10.1177/1045389x12461078

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…In addition, the authors investigated the relation between the image pixel peak value and the damage size level and estimated the damage size with probabilities. Qiu et al 27 developed a phase synthesis‐based time reversal (TR) focusing method. In this method, damage images can be obtained directly through TR focusing.…”

Section: Introductionmentioning

confidence: 99%

Two‐step damage identification method for composite laminates using distributed piezoelectric and strain sensors

Ding

Wang

et al. 2021

Structural Contr & Hlth

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Summary The long‐term service of composite structures and the difficulty of controlling the load environment can cause unavoidable damage and make online damage identification imperative. In this paper, a two‐step damage identification method for small penetrating damage in a fiber‐reinforced composite laminate based on combined active and passive monitoring concepts by using distributed piezoelectric and strain sensors is proposed. First, based on the lamb wave generated via active excitation, the alternating time‐reversal phase synthesis (ATRPS) method with an alternating excitation of each piezoelectric sensor is developed. By reversing the received signals in the time domain, thereby modulating the phase and superposition of all signals, the energy focus of the suspicious damage area is achieved. Second, the gradients between the strain measurements and the damage variables are derived. An optimization method based on the modified quasi‐Newton search (MQNS) method is adopted to identify the damage extent of the suspicious elements by minimizing the error of the strain information between the reference model and the damage model. Numerical and experimental cases are then presented to demonstrate the validity, accuracy, and efficiency of the proposed methodology. The robustness is assessed in detail through a discussion of important parameters and noisy interference.

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Section: Introductionmentioning

confidence: 99%

Two‐step damage identification method for composite laminates using distributed piezoelectric and strain sensors

Ding

Wang

et al. 2021

Structural Contr & Hlth

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“…Intuitively, it is reasonable to assume that when TR process from passive (and/or active) sensors is simulated employing some simplified or even arbitrary models for the GW excitation from the sensor locations, these emitted waves would focus on the position of the initial active source/scatterer. 28 At the same time, it should be examined whether the damage extent could be still estimated.…”

Section: Introductionmentioning

confidence: 99%

Guided wave time-reversal imaging of macroscopic localized inhomogeneities in anisotropic composites

Eremin

Глушков

Glushkova

et al. 2019

Structural Health Monitoring

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Estimation of damage position and extent in the inspected structure is among the emerging problems of active structural health monitoring (SHM) with elastic guided waves. Unlike conventional non-destructive testing (NDT) techniques, which assume continuous surface scanning, SHM systems operate only with data from a limited number of sensors. Nevertheless, in the case of isotropic (metal) plate-like structures, computational time-reversal techniques have proved to be effective for estimating in situ the location and size of wave sources and/or local scatterers within the SHM concept. With composite plates, the reconstruction procedure faces additional difficulties associated with the complexity of wave phenomena caused by their lamination and anisotropy. In this article, we present an extension of the time reversal technique for the case of composite laminate plate-like structures. This technique relies on the simulation of the reversed guided waves generated by reciprocal surface loads applied at a sparse set of measurement points of a real sensor network. The proposed implementation is based on the far-field asymptotics for guided waves generated in arbitrarily anisotropic laminate waveguides by a prescribed source, which have been derived from the path integral representations in terms of Green’s matrix for the structures considered. The performance of this approach has been experimentally tested on cross-ply carbon fiber-reinforced plastic plates showing reliable and adequate results for both active (piezoactuators) and passive (artificial defects) source characterization.

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“…In this paper, aiming at developing a practical method for on-line localization of impact and damage on aircraft structures which can take advantage of the time reversal focusing method, a PZTs array based phase synthesis time reversal Lamb wave source imaging method is proposed based on the researches of references [16][17][18]. Based on the phase synthesis time reversal imaging method, a twin-PZTs array arrangement based damage imaging method is discussed.…”

Section: Introductionmentioning

confidence: 99%

On research of time reversal imaging method and structural health monitoring system

Qiu

Yuan

2014

International Journal of Applied Electromagnetics and Mechanics

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Structural health monitoring (SHM) technology is a reliable, efficient and economical approach to increase the safety and reduce the maintenance cost of high performance structures. Among the existing SHM methods, piezoelectric transducers (PZTs) array and Lamb wave based SHM methods are sensitive to small damage and studied by many researchers. In this paper, aiming at developing a practical method for on-line localization of damage and impact on aircraft composite structure which can take advantage of time reversal focusing and does not rely on the transfer function, a phase synthesis based time reversal focusing method is proposed and a twin-PZTs array arrangement based damage imaging method is discussed. In this method, damage and impact images are given out directly through time reversal focusing and the other imaging processes such as the delay-and-sum imaging method adopted in many researches of time reversal focusing are not needed. And then, a kind of PZTs layer (PSL) with electromagnetic shielding is developed. For real application of SHM, an integrated multi-channel scanning system (ISS) with impact and damage monitoring function is developed thirdly. The ISS can scan large numbers of actuatorsensor channels and estimate impact and damage automatically. Finally, A SHM demonstration system is built on a carbon fiber composite panel with many bolt holes and stiffeners of an aircraft wing box based on the damage and impact imaging method, the PSL and the ISS. The demonstrating results show good performance of the whole SHM system.

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On research of a phase synthesis time reversal focusing method for damage imaging of complex composite structures

Cited by 5 publications

References 32 publications

Two‐step damage identification method for composite laminates using distributed piezoelectric and strain sensors

Two‐step damage identification method for composite laminates using distributed piezoelectric and strain sensors

Guided wave time-reversal imaging of macroscopic localized inhomogeneities in anisotropic composites

On research of time reversal imaging method and structural health monitoring system

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