Correlation between vibrational mode shapes and viscoelastic heat generation in vibrothermography

Montanini, Roberto; Freni, F.

doi:10.1016/j.ndteint.2013.04.007

Cited by 38 publications

(20 citation statements)

References 22 publications

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“…The remaining part of the frictional energy raises the interface temperature. Furthermore, Montanini and Freni 24 explained that the amount of frictional heat generated depends on several parameters, which include coefficient of friction, normal applied force and the sliding relative speed. However, this study kept other factors constant while the forcing frequencies varied.…”

Section: Resultsmentioning

confidence: 99%

Experimentally validated structural vibration frequencies’ prediction from frictional temperature signatures using numerical simulation: A case of laced cantilever beam-like structures

Talai

Desai

Heyns

2017

Advances in Mechanical Engineering

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This article pertains to the prediction of structural vibration frequencies from frictional temperature evolution through numerical simulation. To achieve this, a finite element analysis was carried on AISI 304 steel cantilever beam-like structures coupled with a lacing wire using the commercial software ABAQUS/CAE. The coupled temperature-displacement transient analysis simulated the frictional thermal generation. Furthermore, an experimental analysis was carried out with infrared cameras capturing the interfacial thermal images while the beams were subjected to forced excitation, thus validating the finite element analysis results. The analysed vibration frequencies using a MATLAB fast Fourier transform algorithm confirmed the validity of its prediction from the frictional temperature time domain waveform. This finding has a great significance to the mechanical and aerospace engineering communities for the effective structural health monitoring of dynamic structures online using infrared thermography, thus reducing the downtime and maintenance cost, leading to increased efficiency.

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Section: Resultsmentioning

confidence: 99%

Experimentally validated structural vibration frequencies’ prediction from frictional temperature signatures using numerical simulation: A case of laced cantilever beam-like structures

Talai

Desai

Heyns

2017

Advances in Mechanical Engineering

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“…The remaining part of the frictional energy raises the interface temperature. Further, Montanini and Freni [10] explained that the amount of frictional heat generated depends on several parameters, which includes coefficient of friction, normal applied force and the sliding relative speed.…”

Section: Excitation Of Beam 1 At 40 and 20mentioning

confidence: 99%

“…The authors observed an increase in the surface temperature using an infrared camera due to induced eddy current leading to joule heating. Furthermore, Montanini and Freni [10] established that there exists a correlation of vibrational mode shape to viscoelastic heat generation in vibrothermography. Therefore, analysis of frictional heat generation due to interacting components can result to a quick and reliable indication of the structural vibration characteristics.…”

Section: Introductionmentioning

confidence: 99%

Vibration characteristics measurement of beam-like structures using infrared thermography

Talai

Desai

Heyns

2016

Infrared Physics & Technology

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HIGHLIGHTS A new IRT technique developed for structural vibration measurement in terms of frequency and displacement  Frictional temperature evolution obeys coulomb law of friction  Frictional heat generation increases with structural excitation frequency  FFT checks the spectral peak in the noisy DFT temperature signature  Heat transfer in the beam through conduction is non-linear, thus, finite temperature equation is used for computation of structural displacement ABSTRACT

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“…Consequently, many scholars started to utilize the vibrothermography to detect the defects in the materials. Initially, the vibrothermography was used to evaluate the cracks in the metal materials (Steel [17], Aluminum [18], Titanium and Inconel [19]) and ceramic materials [20]. Subsequently, this method was gradually utilized to detect composite materials as its application proceeding.…”

Section: Introductionmentioning

confidence: 99%

The Use of Vibrothermography for Detecting and Sizing low Energy Impact Damage of Cfrp Laminate

Yin

Tian

Yang

et al. 2017

Advanced Composites Letters

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The detection and evaluation of low energy impact damage of carbon fibre reinforced polymer (CFRP) laminate were investigated using vibrothermography. To this goal, four specimens were begun with low energy impact with different energies, followed by the detection using vibrothermography. The detection results show that the matrix crack is mainly located closer to the surface opposite to impact, while the delamination is mainly closer to the impact surface. Then, an iterative algorithm based on maximal entropy theory was proposed for thermal image segmentation and on this basis, the damaged area was determined. The obtained results show the damaged area increases with the increase of impact energy and the damaged area and impact energy may present an approximate linear relationship.

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Correlation between vibrational mode shapes and viscoelastic heat generation in vibrothermography

Cited by 38 publications

References 22 publications

Experimentally validated structural vibration frequencies’ prediction from frictional temperature signatures using numerical simulation: A case of laced cantilever beam-like structures

Experimentally validated structural vibration frequencies’ prediction from frictional temperature signatures using numerical simulation: A case of laced cantilever beam-like structures

Vibration characteristics measurement of beam-like structures using infrared thermography

The Use of Vibrothermography for Detecting and Sizing low Energy Impact Damage of Cfrp Laminate

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