An NDT technique for composite structures using visualized Lamb-wave propagation

Yashiro, Shigeki; Takatsubo, Junji; Toyama, Nobuyuki

doi:10.1016/j.compscitech.2007.04.006

Cited by 75 publications

(56 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NDT methods can reliably detect and locate defects having dimensions well below those, which could impair the thermal fatigue lifetime. For instance, Non-Destructive Testing (NDT) methods that visualize the propagation of ultrasonic waves in solids are applicable to inspections of composite structures for disbonding detections [8]. These methods are also applied to detect fretting damage on the faying surfaces of intact specimens representing aircraft fuselage joint construction [9].…”

Section: State-of-the Art Non-destructive Testing Methodsmentioning

confidence: 99%

Knowledge-based support in Non-Destructive Testing for health monitoring of aircraft structures

Kamsu-Foguem

2012

Advanced Engineering Informatics

View full text Add to dashboard Cite

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. Maintenance manuals include general methods and procedures for industrial maintenance and they contain information about principles of maintenance methods. Particularly, Non-Destructive Testing (NDT) methods are important for the detection of aeronautical defects and they can be used for various kinds of material and in different environments. Conventional non-destructive evaluation inspections are done at periodic maintenance checks. Usually, the list of tools used in a maintenance program is simply located in the introduction of manuals, without any precision as regards to their characteristics, except for a short description of the manufacturer and tasks in which they are employed. Improving the identification concepts of the maintenance tools is needed to manage the set of equipments and establish a system of equivalence: it is necessary to have a consistent maintenance conceptualization, flexible enough to fit all current equipment, but also all those likely to be added/used in the future. Our contribution is related to the formal specification of the system of functional equivalences that can facilitate the maintenance activities with means to determine whether a tool can be substituted for another by observing their key parameters in the identified characteristics. Reasoning mechanisms of conceptual graphs constitute the baseline elements to measure the fit or unfit between an equipment model and a maintenance activity model. Graph operations are used for processing answers to a query and this graph-based approach to the search method is in-line with the logical view of information retrieval. The methodology described supports knowledge formalization and capitalization of experienced NDT practitioners. As a result, it enables the selection of a NDT technique and outlines its capabilities with acceptable alternatives.

show abstract

Section: State-of-the Art Non-destructive Testing Methodsmentioning

confidence: 99%

Knowledge-based support in Non-Destructive Testing for health monitoring of aircraft structures

Kamsu-Foguem

2012

Advanced Engineering Informatics

View full text Add to dashboard Cite

show abstract

“…Better understanding of delamination behavior in laminated composite materials will cause increasing usage of these materials. Delamination is difficult to distinguish during inspection and the literature revealed that there has been an increased interest in non-destructive testing (NDT) and Finite Element Methods (FEM) for this damage [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Prediction of delamination growth in laminated composites using acoustic emission and Cohesive Zone Modeling techniques

Saeedifar

Fotouhi

Najafabadi

et al. 2015

Composite Structures

View full text Add to dashboard Cite

“…Numerous studies on Lamb wave applications to detect damage in large structures such as airplanes, factories, and ships are underway. Lamb wave generation techniques can be divided into two main categories: those using a contact-type device (e.g., piezoelectric zirconate titanate) [8][9][10][11][12][13][14][15][16][17][18][19][20][21] and those using a non-contact type device [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] . Damage detection using a contact-type device seems inefficient, but inserting the device into a target structure can improve the efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Non-contact type devices include air-coupled transducers [37,38] and laser thermoelasticities [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] . The former involves placing an air-coupled transducer near the Lamb wave generation point on the target structure, and the vibration of the transducer is transmitted through the medium (air in this case).…”

Section: Introductionmentioning

confidence: 99%

Non-contact and non-destructive Lamb wave generation using laser-induced plasma shock wave

Hosoya

Yoshinaga

Kanda

et al. 2018

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

a b s t r a c tThis paper proposes a non-contact and non-destructive method to generate Lamb waves against a target structure using the impulse excitation force generated by laser-induced plasma (LIP). When a high power pulse laser is irradiated in air and its laser fluence exceeds 10 15 W/m 2 , a plasma is formed. While the plasma in air expands in high speed, shock waves on the spherical surface are generated and these shock waves become the impulse excitation force against a target structure, resulting in the non-contact and non-destructive approach. A 2024 aluminum alloy plate is used as the test piece in the experiment, and the dynamic characteristics of the Lamb waves generated from LIP shock waves are measured. Phase velocity and group velocity of generated Lamb waves were compared to the calculated values from Rayleigh-Lamb frequency equations and we found that maximum error was 5% and its frequency component included at least 400 kHz. Further, we investigated the relationship between the distance from the LIP shock wave-generating location to a test piece and the dynamic characteristics of the generated Lamb waves. This method can control the amplitude and the frequency components of generated Lamb waves by changing this distance.

show abstract

An NDT technique for composite structures using visualized Lamb-wave propagation

Cited by 75 publications

References 20 publications

Knowledge-based support in Non-Destructive Testing for health monitoring of aircraft structures

Knowledge-based support in Non-Destructive Testing for health monitoring of aircraft structures

Prediction of delamination growth in laminated composites using acoustic emission and Cohesive Zone Modeling techniques

Non-contact and non-destructive Lamb wave generation using laser-induced plasma shock wave

Contact Info

Product

Resources

About