Numerical modeling of vibrothermography based on plastic deformation

Mabrouki, Farid; Thomas, Marc; Genest, Marc; Fahr, A.

doi:10.1016/j.ndteint.2010.05.002

Cited by 28 publications

(15 citation statements)

References 20 publications

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“…Some numerical simulations suggest that plastic deformation is significant [6] and others suggest it is not [7]. In our own experiments the locus of heating is usually observed well inward (e.g.…”

Section: Introductionmentioning

confidence: 49%

Quantifying the vibrothermographic effect

Holland

Uhl²,

Ouyang

et al. 2011

NDT & E International

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Vibrothermography, also known as Sonic IR and thermosonics, is a method for finding cracks through thermal imaging of vibration-induced crack heating. Due to large experimental variability and equipment which has, up to now, yielded mostly qualitative results, little data has been available to help quantify the vibrothermographic effect. This paper quantitatively evaluates the relationship between vibrothermographic crack heating, crack size, and vibrational stress in a series of tests on 63 specimens each of Ti-6-4 titanium and Inconel 718 at three different sites with different equipments. Test specimens are excited in a resonant mode. Infrared cameras record the crack heating, and vibrational stress is evaluated from the known vibrational mode shape combined with vibrational velocities measured using a laser vibrometer. Crack heating increases both with crack length and dynamic vibrational stress level. Data from all three sites gives similar probability of detection (POD) curves. The relationship of crack heating to crack size and vibrational stress will provide a means in the future to predict crack detectability based on vibration measurements. (POD) curves. The relationship of crack heating to crack size and vibrational stress will provide a means in the future to predict crack detectability based on vibration measurements

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Section: Introductionmentioning

confidence: 49%

Quantifying the vibrothermographic effect

Holland

Uhl²,

Ouyang

et al. 2011

NDT & E International

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“…The heat source varies according to the technique employed. So far active thermography has been implemented with surface heating by pulsed laser [10,11] and flashlamps [11][12][13][14][15][16]; also no optical heat sources [12] like mechanical vibration [13,14], acoustic wave excitation [15] and microwaves [17] have been applied in active thermography. Regarding its application as NDT method, active thermography not only allows the detection and characterization of pathologies and flaws in materials [18,19], but also enables obtaining thermophysical parameters of the objects such as thermal diffusivity and thermal effusivity [20,21].…”

Section: Introductionmentioning

confidence: 99%

Cooling analysis of welded materials for crack detection using infrared thermography

Rodríguez‐Martín

Lagüela

González‐Aguilera

et al. 2014

Infrared Physics & Technology

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“…Virtual damage detection is inevitably related to physical modelling and numerical simulations. Previous work in this area include numerical studies on the efficiency of monoharmonic and chaotic ultrasonic excitations in generating heat around fatigue cracks , analysis of sources of energy dissipation (friction and plastic deformation) , analysis of crack detection in metallic components , and detection of fatigue damage in composite materials .…”

Section: Introductionmentioning

confidence: 99%

Modelling and numerical simulations of vibrothermography for impact damage detection in composites structures

Pieczonka

Aymerich

Brożek

et al. 2012

Struct. Control Health Monit.

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The paper investigates modelling aspects related to application of vibrothermography for detection of barely visible impact damage in composite structures. Low-velocity impact tests were performed to introduce multiple delaminations into carbon/epoxy composite plate. Damage severity was revealed using well-established non-destructive evaluation techniques. Vibrothermography was used subsequently to show good agreement with classical damage detection techniques. Following these experimental investigations, numerical simulations were performed to assess feasibility and sensitivity of vibrothermography for impact damage detection. Numerical results were validated using experimental data showing very good qualitative and encouraging quantitative agreement. The study demonstrates that virtual impact damage detection using vibrothermography can be performed as part of structural design to assess sensitivity of the method in real engineering applications.

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Numerical modeling of vibrothermography based on plastic deformation

Cited by 28 publications

References 20 publications

Quantifying the vibrothermographic effect

Quantifying the vibrothermographic effect

Cooling analysis of welded materials for crack detection using infrared thermography

Modelling and numerical simulations of vibrothermography for impact damage detection in composites structures

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