Use of acoustic emission to characterize corrosion fatigue damage accumulation in glass fiber reinforced polyester laminates

Kotsikos, G.; Evans, J.T.; Gibson, A.G.; Hale, J. M.

doi:10.1002/pc.10392

Cited by 53 publications

(32 citation statements)

References 9 publications

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“…Attribution of each cluster to one particular damage mechanism was done by using previous results for clustering based on the amplitude only. Several authors [16,17,18,19] have shown that acoustic events with lower amplitudes are associated to matrix cracking whereas those with higher amplitudes are associated to fibre breakage. The intermediate range corresponds to interface damages.…”

Section: Acoustic Emission (Ae)mentioning

confidence: 99%

Fatigue behaviour of open-hole samples and automotive mini-structures made of woven glass-fibre-reinforced polyamide 6,6

et al. 2018

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Abstract. In the automotive industry, the integration of thermoplastic composite components represents a high-potential solution to the mass reduction challenge. In this study, a woven glassfibre-reinforced composite with a polyamide 6,6 matrix is considered for the purpose of being integrated into automotive parts. Tension-tension fatigue tests were conducted on [(0/90) 3 ] openhole samples. These tests were instrumented with non-destructive techniques, namely acoustic emission and infrared thermography. Acoustic emission results showed fibre-matrix debonding and fibre breakages in open-hole samples, located around the hole. Furthermore, 3-point bending fatigue tests were performed on "omega" mini-structures. A semi-empirical model was used in order to predict the fatigue lives of both open-hole coupons and automotive mini-structures. Predictions of the model for open-holes samples underestimate experimental fatigue lives. Nevertheless, the semiempirical model showed good results for the fatigue life prediction of composite mini-structures.

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Section: Acoustic Emission (Ae)mentioning

confidence: 99%

Fatigue behaviour of open-hole samples and automotive mini-structures made of woven glass-fibre-reinforced polyamide 6,6

et al. 2018

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“…[14] Kotsikos and al. [15][16] and Benzeggagh and al. [17][18], all these authors and many others have classified the amplitudes into three or four groups, as appropriate, to involve the various failure modes of composite materials.…”

Section: Fig3 Stress-strain Responses Under Tension Loading Gfrpmentioning

confidence: 99%

Effect of fatigue testing on the properties of Glass-Epoxy composites using the acoustic tool

et al. 2017

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Abstract. This study presents the experimental results of the influence of mechanical fatigue on composite material. The plates of Glass fiber with SR 1500 epoxy resin with SD 2505 composite were realized by vacuum molding. Experimental tests were carried out on a standard hydraulic machine INSTRON 8516. The machine is interfaced with a dedicated computer for controlling and data acquisition. The fatigue tests were performed using sinusoidal type of waveform at a displacement control with frequency of 10 Hz. The evolution of Young's modulus and strain based on fatigue gives us an idea about the resistance of the material. Degradation of mechanical properties was observed, and the results have showed that the Young's modulus of plates undergo only minor changes. In fact, the residual stiffness and residual strength decrease when the cycle number of fatigue increase (100 to 50000 cycles), indicating that the studied composites have experienced some forms of mechanical damage.The mechanical tests were backed by Acoustic Emission Monitoring (AEM) during the load cycle, in order to understand the nature of the failure process in the composites such as fiber breakage, matrix crazing, matrix debonding and delamination etc.

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“…Forty years of research have led to the agreement that there are four main damage mechanisms identifiable in composite materials by their acoustic emission Bsignature^ [36,37]: (i) matrix cracking, (ii) interfacial debonding, (iii) fibrematrix friction/fibre pull-out, and (iv) fibre breakage. Researchers have used many different methods to distinguish these damage mechanisms during mechanical testing including, but not limited to, classification of acoustic signature [20,[37][38][39], amplitude and frequency distribution analysis [20,, and analysis of different features of the waveform [37,44]. Figure 3 shows a typical AE signal and the parameters that are commonly used for analysis of AE-generating damage events.…”

Section: Acoustic Emission Monitoringmentioning

confidence: 99%

Characterisation of Damaged Tubular Composites by Acoustic Emission, Thermal Diffusivity Mapping and TSR-RGB Projection Technique

2016

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An increase in the use of composite materials, owing to improved design and fabrication processes, has led to cost reductions in many industries. Resistance to corrosion, high specific strength, and stiffness are just a few of their many attractive properties. However, damage tolerance remains a major concern in the implementation of composites and uncertainty regarding component lifetimes can lead to over-design and under-use of such materials. A combination of non-destructive evaluation (NDE) and structural health monitoring (SHM) have shown promise in improving confidence by enabling data collection in-situ and in real time. In this work, infrared thermography (IRT) is employed for NDE of tubular composite specimens before and after impact. Four samples are impacted with energies of 5 J, 7.5 J, and 10 J by an un-instrumented falling weight set-up. Acoustic emissions (AE) are monitored using bonded piezoelectric sensors during one of the four impact tests. IRT data is used to generate diffusivity and thermal depth mappings of each sample using the thermographic signal reconstruction (TSR) red green blue (RGB) projection technique. Analysis of AE data alone for a 10 J impact suggest significant damage to the fibres and matrix; this is in good agreement with the generated thermal depth mappings for each sample, which indicate damage through multiple fibre layers. IRT and AE data are correlated and validated by optical micrographs taken along the cross section of damage.

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Use of acoustic emission to characterize corrosion fatigue damage accumulation in glass fiber reinforced polyester laminates

Cited by 53 publications

References 9 publications

Fatigue behaviour of open-hole samples and automotive mini-structures made of woven glass-fibre-reinforced polyamide 6,6

Fatigue behaviour of open-hole samples and automotive mini-structures made of woven glass-fibre-reinforced polyamide 6,6

Effect of fatigue testing on the properties of Glass-Epoxy composites using the acoustic tool

Characterisation of Damaged Tubular Composites by Acoustic Emission, Thermal Diffusivity Mapping and TSR-RGB Projection Technique

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