Lamb-wave-based two-dimensional areal scan damage imaging using reverse-time migration with a normalized zero-lag cross-correlation imaging condition

He, Jiaze; Fang, Yuan

doi:10.1177/1475921716674373

Cited by 30 publications

(23 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The process of traditional RTM contains three parts: the forward wavefield simulation, the back-propagation of the time-reversed received signals, and the application of imaging conditions [17]. As mentioned earlier, a normalized ZLCC imaging condition [15] in RTM can generate the reflectivity or the reflective coefficients of the damaged region.…”

Section: Lsrtm Theorymentioning

confidence: 99%

“…Excitation or reception components can be piezoelectric wafers [7,8], shear-horizontal transducers [9,10], polyvinylidene difluoride (PVDF) transducers [11], air-coupled transducers [12,13], pulsedlaser [14] and laser Doppler vibrometer (LDV) [15]. The patterns for transducer distribution vary from sparse array [16] to densely distributed arrays [17,18], and full-aperture array [19,20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Least-squares reverse time migration (LSRTM) for damage imaging using Lamb waves

Rocha

Leser

et al. 2019

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

Large-area monitoring and accurate damage quantification are two primary goals of ultrasonic, guided wave-based structural health monitoring (SHM). Reverse-time migration (RTM) is an effective damage imaging technique for both metallic and composite plates. In geophysics, incorporating least-squares inversion into migration can generate images with higher resolution and suppressed artifacts in comparison with conventional RTM. Development of a least-squares reverse time migration (LSRTM) technique is promising for SHM since it could expand the imaging area for a given sensor array while maintaining a relatively high resolution. An LSRTM technique is introduced in this research for damage imaging in an isotropic plate using A 0 mode Lamb waves. A finite difference algorithm based on the Mindlin plate theory was used to simulate the flexural wave propagation. To form the theoretical foundations for guided wavebased LSRTM, a forward modeling operator and its adjoint are defined. The damage images from both numerical simulations and experiments show that LSRTM can enhance imaging resolution and reduce artifacts.

show abstract

Section: Lsrtm Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Least-squares reverse time migration (LSRTM) for damage imaging using Lamb waves

Rocha

Leser

et al. 2019

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the recent years, several hybrid approaches have been developed which achieve successful localization and characterization of damage using an optimum number of A/S, by combining various techniques. One of such researches is the reverse‐time migration with a normalized zero‐lag cross‐correlation imaging algorithm which can be implemented within a wide range of engineering problems . Finally, another hybrid approach is a multilevel decision fusion strategy which employs an energy‐based technique for damage detection, electro‐mechanical impedance model for damage localization whereas the damage characterization is performed based on the weighted energy arrival method…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach

Stojić

Nestorović

Marković

et al. 2018

Struct Control Health Monit

View full text Add to dashboard Cite

This paper presents an experimental–numerical analysis of damage localization of concrete plate‐like elements on the basis of hybrid approach. The proposed hybrid approach uses the fast discrete wavelet transform, energy approach, and time of flight criterion for the purpose of localization of single and multidamage problems inside or on the periphery of concrete elements. Verification of the proposed damage localization approach has been performed under laboratory conditions using a laser scanning‐based system with piezoelectric excitation of the wave propagation. Numerical simulation of the wave propagation is performed using the explicit finite element method using 3D models with linear‐elastic material model of concrete with Rayleigh damping. The Rayleigh damping coefficients are determined on the basis of experimental data and implemented in numerical models. Validation of the numerical model is conducted, based on the comparison with sensor output signals obtained through experimental measuring and a very good agreement of results is obtained. The proposed hybrid approach to damage localization is verified using 15 different models/specimens, varying the number, shape (circular or notched), and position of damage, as well as the number and placement of actuators/sensors. For all the analyzed scenarios, the hybrid approach successfully localized the damage even for the least number of used sensor positions. In the models with the circular damage, the damage image created on the basis of the hybrid approach is almost identical to the actual shape of the damage, indicating a good potential of the method for damage localization.

show abstract

“…The analysis of contact stress around these area is important in understanding the onset and propagation of those failures: it will provide guidelines for the design of contact components so that the damage can be limited [11,12,[15][16][17][18][19][20][21]. Based on experimental observations, the sliding behavior between two elastic bodies in contact can be described by three regimes on a map of tangential and normal loads: full-stick, partial-slip and gross-sliding regimes [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Contact around a Sharp Corner with Small Scale Plasticity

Hu¹

2017

View full text Add to dashboard Cite

Abstract:Owing to elastic singularity, the contact stress around a sharp corner is highly sensitive to the boundary conditions and local geometrical details. Determination of such stress is critical in predicting failures such as wear, fretting fatigue and crack initiation. In this paper, the stress around such corner is analyzed based on linear elasticity and small scale plasticity. The stress on the contact interface is generalized in a way that the results can be easily converted to represent another corner with different dimensions or boundary conditions. An example is presented to show the determination of the stress scale and the formulation of a generalized solution. It is shown that the generalized macro stress field away from the corner dominates the contact behaviors around the corner.

show abstract

Lamb-wave-based two-dimensional areal scan damage imaging using reverse-time migration with a normalized zero-lag cross-correlation imaging condition

Cited by 30 publications

References 48 publications

Least-squares reverse time migration (LSRTM) for damage imaging using Lamb waves

Least-squares reverse time migration (LSRTM) for damage imaging using Lamb waves

Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach

Contact around a Sharp Corner with Small Scale Plasticity

Contact Info

Product

Resources

About