Prediction of quasi-static delamination onset and growth in laminated composites by acoustic emission

Saeedifar, Milad; Fotouhi, Mohamad; Najafabadi, Mehdi Ahmadi; Hosseini‐Toudeshky, Hossein; Minak, Giangiacomo

doi:10.1016/j.compositesb.2015.09.037

Cited by 70 publications

(32 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…AE is under active investigation as a means of locating damage and measuring damage size in composite or adhesively bonded materials, as e.g. recently reported in [16][17][18][19]. It should be stressed that this was not the purpose of the current research.…”

Section: Introductionmentioning

confidence: 94%

Using acoustic emission to understand fatigue crack growth within a single load cycle

Pascoe

Zarouchas

Alderliesten

et al. 2018

Engineering Fracture Mechanics

View full text Add to dashboard Cite

Current methods for prediction of fatigue crack growth are based on empirical correlations which do not take the crack growth behaviour within a single cycle into account. To improve these prediction methods, more understanding of the physical mechanisms of crack growth is required. In this research the acoustic emission technique was used to investigate the crack growth behaviour during a single fatigue cycle. It was found that crack growth can potentially occur both during loading and unloading, but only while the strain energy release rate is above a crack growth (CG) threshold value. The results suggest this CG threshold value is the same in both quasi-static and fatigue loading. Further work is necessary to fully understand the link between the received acoustic emission signals and the actual crack growth processes. Nevertheless, the paper shows the potential of acoustic emission to provide more insight into the physics of crack growth. max min , is assumed to

show abstract

Section: Introductionmentioning

confidence: 94%

Using acoustic emission to understand fatigue crack growth within a single load cycle

Pascoe

Zarouchas

Alderliesten

et al. 2018

Engineering Fracture Mechanics

View full text Add to dashboard Cite

show abstract

“…Acoustic Emission (AE) as a passive NDE technique has the capability for the online monitoring of the induced damages in laminated composites [17][18][19][20][21][22]. Pashmforoush et al [23] classified four different damage mechanisms in sandwich composites using AE and k-Means genetic algorithm.…”

Section: Introductionmentioning

confidence: 99%

Barely visible impact damage assessment in laminated composites using acoustic emission

Saeedifar

Najafabadi

Zarouchas

et al. 2018

Composites Part B: Engineering

Self Cite

View full text Add to dashboard Cite

Despite the key advantages of Fiber Reinforced Polymer (FRP) composites, they are susceptible to Barely Visible Impact Damage (BVID) under transverse loadings. This study investigates BVID in two quasi-isotropic carbon/ epoxy laminates under quasi-static indentation and Low-Velocity Impact (LVI) loadings using Acoustic Emission (AE). First, the evolution of interlaminar and intralaminar damages is studied by analyzing the AE signals of the indentation test using b-value and sentry function methods. Then, the specimens are subjected to the LVI loading and the induced damages are compared with the indentation test and the percentage of each damage mechanism is calculated using Wavelet Packet Transform (WPT). In consistent with the mechanical data, ultrasonic C-scan and digital camera images of the specimens, the AE results show a considerable similarity between the induced BVID under quasi-static indentation and LVI tests. Finally, the obtained results show that AE is a powerful tool to study BVID in laminated composites under quasi-static and dynamic transverse loadings.

show abstract

“…However, they are often attributed to amplitudes between fibre/matrix debonding and fibre breakage. In particular cases, especially for crossed-ply composites, the AE technique can be used to detect delamination [20]. However, this global phenomenon contains several damage mechanisms such as fibre pull-out and cracking, or fibre/matrix friction.…”

Section: Introductionmentioning

confidence: 99%

Mechanical behaviour and damage mechanisms analysis of a flax-fibre reinforced composite by acoustic emission

Monti

Mahi

Jendli³

et al. 2016

Composites Part A: Applied Science and Manufacturing

123

View full text Add to dashboard Cite

This article presents the mechanical characterization of an eco composite consisting of a thermoplastic matrix reinforced by flax fibres. Different configurations of specimens were tested with uniaxial tensile loading and their mechanical behaviours were discussed. Moreover, the acoustic emission technique was used to detect the appearance of damage mechanisms and to follow their evolution. In addition, a list of these mechanisms was established by means of macroscopic and microscopic observations. The acoustic emission records were post processed by the k-means unsupervised pattern recognition algorithm. Depending on the specimen configuration, three or four classes of events were obtained. The acoustic characteristics of these classes were compared. Then, a correlation between these AE events classes and the damage mechanisms observed was proposed. Their effects on the mechanical behaviour of the material were investigated by means of a variable called the Sentry Function.

show abstract

Prediction of quasi-static delamination onset and growth in laminated composites by acoustic emission

Cited by 70 publications

References 34 publications

Using acoustic emission to understand fatigue crack growth within a single load cycle

Using acoustic emission to understand fatigue crack growth within a single load cycle

Barely visible impact damage assessment in laminated composites using acoustic emission

Mechanical behaviour and damage mechanisms analysis of a flax-fibre reinforced composite by acoustic emission

Contact Info

Product

Resources

About