Fatigue damage evolution of fiber reinforced composites with digital image correlation analysis

“…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%

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

Zuluaga-Ramírez

Arconada

Frövel

et al. 2015

Sensors

View full text Add to dashboard Cite

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.

show abstract

“…An approach for DIC that utilises low-cost cameras and can be used during fatigue loading has been developed in [20], known as LIDIC (lock-in DIC), similar to that used in [10,11]. The approach captures a series of white-light images over multiple loading cycles.…”

Section: Automated Image Capture Methodologymentioning

confidence: 99%

“…A further benefit is that such full-field imaging techniques can view an DIC has been used to assess damage progression in glass reinforced polymer (GFRP) material under cyclic loading, e.g. [10,11], where the images captured were under sampled and correlated with the cyclic load to reconstruct the overall strain change necessary to perform the DIC over a number of cycles. Likewise [9] is an example of where TSA has been used to evaluate fatigue damage progression.…”

Section: Introductionmentioning

confidence: 99%

Data-rich characterisation of damage propagation in composite materials

Battams

Dulieu-Barton

2016

Composites Part A: Applied Science and Manufacturing

View full text Add to dashboard Cite

A novel methodology for the synchronised capture of high resolution white-light and infra-red (IR) images during a fatigue test is described. The approach allows digital image correlation (DIC) and thermoelastic stress analysis (TSA) to be applied practically simultaneously without the requirement to pause the cyclic load. The methodology is demonstrated on cross-ply carbon-epoxy specimens that have experienced damage induced by intermediate strain rate loading. Similar undamaged specimens are studied and the results from each compared.Various damage types are identified which include transverse cracking, delaminations and longitudinal splitting. The results are verified using X-ray computed tomography (CT).

show abstract

Fatigue damage evolution of fiber reinforced composites with digital image correlation analysis

Cited by 43 publications

References 17 publications

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

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

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

Data-rich characterisation of damage propagation in composite materials

Contact Info

Product

Resources

About