State-of-the-art laser adhesion test (LASAT)

Berthe, Laurent; Арригони, М.; Boustie, M.; Cuq‐Lelandais, J.‐P.; Broussillou, C.; Fabre, Grégory; Jeandin, Michel; Guipont, Vincent; Nivard, Mariette

doi:10.1080/10589759.2011.573550

Cited by 83 publications

(39 citation statements)

References 19 publications

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“…Another one is laser shock-induced permanent compaction of porous materials such as sintered steels, over a few hundreds of µm below the loaded surface [4], to improve their mechanical properties. A third example of industrial interest is the LAser Shock Adhesion Test (LASAT), which can be used to investigate debonding at a substrate-coating interface [5,6]. In order to optimize those processes and analyze their effects, physically based simulations are required to describe wave propagation from the loaded surface, subsequent pressure decay, plastically-affected depth, polymorphic transformations etc.…”

Section: Introductionmentioning

confidence: 99%

Laser-Driven Ramp Compression to Investigate and Model Dynamic Response of Iron at High Strain Rates

Amadou

Brambrink

Rességuier

et al. 2016

Metals

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Efficient laser shock processing of materials requires a good characterization of their dynamic response to pulsed compression, and predictive numerical models to simulate the thermomechanical processes governing this response. Due to the extremely high strain rates involved, the kinetics of these processes should be accounted for. In this paper, we present an experimental investigation of the dynamic behavior of iron under laser driven ramp loading, then we compare the results to the predictions of a constitutive model including viscoplasticity and a thermodynamically consistent description of the bcc to hcp phase transformation expected near 13 GPa. Both processes are shown to affect wave propagation and pressure decay, and the influence of the kinetics of the phase transformation on the velocity records is discussed in details.

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Section: Introductionmentioning

confidence: 99%

Laser-Driven Ramp Compression to Investigate and Model Dynamic Response of Iron at High Strain Rates

Amadou

Brambrink

Rességuier

et al. 2016

Metals

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“…For example, ultrasound imagery can be performed to check the state of the bond. If a decohesion is observed, it indicates that the bond was not strong enough to withstand the induced tensile stresses [8].…”

Section: Symmetrical Shotmentioning

confidence: 99%

Development of the symmetrical laser shock test for weak bond inspection

Sagnard

Berthe

Ecault

et al. 2018

AIP Conference Proceedings

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“…The use of such high power lasers generates plasma which induces high pressure shock waves (GPa) inside the target. Such high-pressure shock waves allowed a wide range of applications such as LSP (Laser Shock Peening) [14] and LASAT (LAser Shock Adhesion Test) [15]. LASAT consists of testing material interfaces with laser-driven shock waves.…”

Section: Lswt: Principle and Fundamentalsmentioning

confidence: 99%

Generation of controlled delaminations in composites using symmetrical laser shock configuration

Ghrib

Berthe

Mechbal

et al. 2017

Composite Structures

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. b s t r a c tStructural Health Monitoring (SHM) is defined as the process of implementing a damage identification strategy for aerospace, civil and mechanical engineering infrastructures. SHM can be organized into five main steps: detection, localization, classification, quantification and prognosis. Our work considers SHM quantification level and in particular the evaluation of the severity of delamination-type damage in CFRP composite laminates. Prior to quantification algorithms implementation, it is important to properly prepare the supports on which algorithms will be tested. Teflon inserts and conventional impacts are commonly used techniques to generate or simulate delaminations. However, with such rudimentary techniques it is difficult to generate controlled delamination-type damage in a realistic way. In the present work, we investigate symmetrical laser shock approach, as a new method to calibrate delaminations in composites. By tuning the time delay between the two laser beams and laser energy, throughthickness damage position and severity can respectively be adjusted. The effect of multiple contiguous laser impacts was also investigated. Post-mortem analyses using A-scan and C-scan testing as well as penetrant testing were performed in order to characterize laser impact induced damage.Results are encouraging and demonstrate the high potential of symmetrical laser shock for damage calibration in both size and location.

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State-of-the-art laser adhesion test (LASAT)

Cited by 83 publications

References 19 publications

Laser-Driven Ramp Compression to Investigate and Model Dynamic Response of Iron at High Strain Rates

Laser-Driven Ramp Compression to Investigate and Model Dynamic Response of Iron at High Strain Rates

Development of the symmetrical laser shock test for weak bond inspection

Generation of controlled delaminations in composites using symmetrical laser shock configuration

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