Evaluation of energy of fatigue damage into GFRC through digital image correlation and thermography

Dattoma, V.; Giancane, S.

doi:10.1016/j.compositesb.2012.10.030

Cited by 48 publications

(24 citation statements)

References 13 publications

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“…These are typically based on measuring material properties such as the stiffness degradation of the material [7,8,9]. Other techniques are based on phenomenological changes [2] such as ultrasonic methods [10], acoustic emissions [11], infrared imaging, thermography [12,13], electrical resistance [14], digital image correlation [13,15], and X-ray tomography [16]. …”

Section: Introductionmentioning

confidence: 99%

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Optical Sensing of the Fatigue Damage State of CFRP under Realistic Aeronautical Load Sequences

Zuluaga-Ramírez

Arconada

Frövel

et al. 2015

Sensors

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We present an optical sensing methodology to estimate the fatigue damage state of structures made of carbon fiber reinforced polymer (CFRP), by measuring variations on the surface roughness. Variable amplitude loads (VAL), which represent realistic loads during aeronautical missions of fighter aircraft (FALSTAFF) have been applied to coupons until failure. Stiffness degradation and surface roughness variations have been measured during the life of the coupons obtaining a Pearson correlation of 0.75 between both variables. The data were compared with a previous study for Constant Amplitude Load (CAL) obtaining similar results. Conclusions suggest that the surface roughness measured in strategic zones is a useful technique for structural health monitoring of CFRP structures, and that it is independent of the type of load applied. Surface roughness can be measured in the field by optical techniques such as speckle, confocal perfilometers and interferometry, among others.

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Section: Introductionmentioning

confidence: 99%

“…Among them, optical techniques are going to be very used due to their advantages. Specifically, speckle techniques and confocal microscopy are two of the most useful methods [21,22], which may be employed with a reasonable economic cost and short time when comparing them with other methods [12,13,16]. …”

Section: Introductionmentioning

confidence: 99%

Optical Sensing of the Fatigue Damage State of CFRP under Realistic Aeronautical Load Sequences

Zuluaga-Ramírez

Arconada

Frövel

et al. 2015

Sensors

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“…Others include non-contact techniques such as thermography, digital image correlation [16,17] and X-ray Tomography [18].…”

Section: Introductionmentioning

confidence: 99%

Non contact inspection of the fatigue damage state of carbon fiber reinforced polymer by optical surface roughness measurements

Zuluaga-Ramírez

Frövel

Belenguer

et al. 2015

NDT & E International

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“…Using DIC, Ambu et al found that there is a change in strain at regions near the hole in a notched composite due to redistribution of stresses, which ultimately leads to an increase in strength with increase in cyclic loading. Giancane et al and Dattoma and Giancane reported that DIC is an effective technique to compute the evolution of stiffness degradation and energy dissipated in every cycle during fatigue of notched GFRPs. Broughton et al were successful in monitoring the local and global strains using DIC and fibre Bragg grating measurements in notched GFRP subjected to constant/block amplitude fatigue loading.…”

Section: Introductionmentioning

confidence: 99%

Determination of damage evolution in CFRP subjected to cyclic loading using DIC

Venkatachalam

Mohiddin

Murthy

2018

Fatigue Fract Eng Mat Struct

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Damage evolution in carbon fibre reinforced plastic subjected to fatigue loading (R = 0.5, −1, 2) has been studied using digital image correlation to obtain full‐field surface strains. Damage initiation being a local phenomenon, its effect on global parameters is not significant. The local transverse strain is a better indicator of delamination which affects transverse strain more than the longitudinal strain. Variation of normalized local transverse strain (ratio of local transverse strain to applied stress) near the initiated delamination indicates that the damage evolution occurs over 2 to 3 stages. Each stage has a stable damage growth with a drastic increase between the stages. The stages correspond to different damage mechanisms (matrix cracking, fibre‐matrix debonding, delamination, and fibre breakage) dominating at different periods during the fatigue life. Scatter in normalized local transverse strain plots due to large relative displacements was eliminated using different reference images for DIC. Waviness due to shift in the time at which the images are captured during the loading cycles was avoided using a sine curve fit to obtain maximum transverse strain in a cycle. Normalized local transverse strain plots were found to qualitatively reflect the physical extent of damage, thereby providing confidence in the methodology. Fatigue life curves were generated and run‐out lives were determined.

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Evaluation of energy of fatigue damage into GFRC through digital image correlation and thermography

Cited by 48 publications

References 13 publications

Optical Sensing of the Fatigue Damage State of CFRP under Realistic Aeronautical Load Sequences

Optical Sensing of the Fatigue Damage State of CFRP under Realistic Aeronautical Load Sequences

Non contact inspection of the fatigue damage state of carbon fiber reinforced polymer by optical surface roughness measurements

Determination of damage evolution in CFRP subjected to cyclic loading using DIC

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