Static and fatigue characterization of flax fiber reinforced thermoplastic composites by acoustic emission

Haggui, Mondher; Mahi, Abderrahim El; Jendli, Zouhaier; Akrout, Ali; Haddar, Mohamed

doi:10.1016/j.apacoust.2018.03.011

Cited by 90 publications

(52 citation statements)

References 31 publications

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“…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

107

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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.

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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

107

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“…Acoustic emission (AE), an efficient and nondestructive testing method, has been widely used as indoor tests on concrete, coal, and rock mass [28]. Various researchers have shown that AE technology can be effectively used to study the mechanical strength properties and failure modes of cemented waste concrete-coal-crushing gangue backfilling [29][30][31][32]. In addition, Feng et al [33] experimentally studied the dynamic evolution of rock cracks in the loading process by using the AE equipment.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Acoustic Emission and Triaxial Mechanical Properties of Rock-Cemented Tailings Matrix Composites

Cao

Yilmaz

Song

et al. 2019

Advances in Materials Science and Engineering

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Acoustic emission (AE) test is a powerful technique for examining the sounds of cracks growing, breaking, and other modes of damage in cementitious materials deforming under stress, such as rock-cemented tailings matrix composites (RCTMC). RCTMC, an engineered mixture of tailings, cement, rock, and water, is widely used to fulfill numerous important roles at underground mine sites as a construction material and a ground support tool. To study the mechanical strength and AE properties of RCTMC, compression testing was carried out using a triaxial compression test system (TAW-2000) and AE monitoring system (PCI-2), and the failure modes of samples were also examined. Results have shown that (1) the failure process of RCTMC samples can be divided into six main stages: compaction, linear elastic characteristic, crack growth, primary damage development, cemented tailings backfill withstand stress zone, and secondary damage development stage. CTB has the strengthening effect on mechanical strength of rock; (2) the AE process can be also divided into six main stages: the prepeak quiescence period, the elastic energy reserve period, the first destruction development AE area, the secondary energy reserve period, the second damage development stage, and the postpeak calm period; and (3) samples' cumulative ring count is "stepped" distribution over time, and the ring count has entered the postpeak flat stage after many active periods. e process of RCTMC samples from tensile to shear failure mode is represented by numerical simulation. Finally, the obtained experimental results can offer a useful reference for the further study of the mechanism of the surrounding rock and cemented tailings backfill structure.

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“…To heighten the acoustic properties of fibrous materials, they have been optimized by thermoplastic polymer, component, processing parameters, and nonwoven structure . Ramamoorthy et al fabricated silica aerogels in organic fiber nonwoven fabrics and studied their sound absorption properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of crossing film among glass fibers on blanket performance

Chen

Wang

et al. 2019

Polymer Composites

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An effective film construction was provided as a noise‐reducing materials based on self‐assembled polymer film supported by ultralight glass fiber blanket (UGFB) skeleton. The synthesized polymer film enhanced UGFB structure shows about 60% improvement over a broad frequencies compared to neat UGFB. The sound transmission loss has a remarkably increasing of 16.59 dB at 4 kHz. The reinforced acoustic performances was created by the structural optimization of UGFB/UMPR‐film, owing to the observably enhanced tortuosity in sound waves transmission and reinforced surface area, which can induce more viscous and thermal losses when the acoustic wave consumes in the semiopen pore construction. Moreover, the UGFB/UMPR‐film demonstrates 7.4 times increasing in breaking strength (width direction) and the degrees of uniformity lower than 0.0771. The manufacture of this new acoustic damping materials is low cost, structural controllable, and easy to large‐scale preparation, making it can be applied in multitudinous applications.

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Static and fatigue characterization of flax fiber reinforced thermoplastic composites by acoustic emission

Cited by 90 publications

References 31 publications

Barely visible impact damage assessment in laminated composites using acoustic emission

Barely visible impact damage assessment in laminated composites using acoustic emission

Assessment of Acoustic Emission and Triaxial Mechanical Properties of Rock-Cemented Tailings Matrix Composites

Effect of crossing film among glass fibers on blanket performance

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