Effect of Thickness and Denting Behavior of Glass/Epoxy Laminates Subjected to Quasi-Static Indentation (QSI) Loading Under Acoustic Emission Monitoring

Lakshminarayanan, B Sai; Arumugam, V.

doi:10.1007/s10921-018-0519-8

Cited by 7 publications

(2 citation statements)

References 28 publications

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“…Figure 7 shows the amplitude and peak frequency versus displacement for Specimen A and B at different loading stages, respectively. On the basis of the previous research, 29,31 AE signals with frequency range of 70–120 kHz may be associated with the matrix cracking, the mid-frequency range (130–180 kHz) may be related to delamination. With the aggravation of the damage degree, AE signals with 190–260 and 270–300 kHz may be associated with fiber/matrix debonding and fiber failure, respectively.…”

Section: Resultsmentioning

confidence: 89%

Flexural progressive damage and failure behavior of carbon-aramid/epoxy hybrid woven composites

Yin

Zhou

Zhang

et al. 2020

Journal of Composite Materials

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Two kinds of carbon aramid/epoxy hybrid woven composite specimens with different fiber orientations were prepared. The progressive flexural damage behaviors of the composites were studied. The failure process was monitored in real time by acoustic emission during the test, and the characteristics of the acoustic emission signals originating from the damage were deeply studied. In addition, the internal damage initiation/evolution and failure mechanisms were characterized by X-ray micro-computed tomography. The results show that composite specimens exhibit higher strength and obvious quasi-brittle damage behavior when carbon fiber orients along the loading direction, and the macroscopic failure is mainly shear fracture, which propagates in the direction of thickness, and the damage is dominantly distributed above the neutral plane of specimen. When aramid fiber orients along the loading direction, composite specimens show high ductility and the failure modes are mainly ply fracture at the bottom, delamination (inter-ply delamination and intra-ply delamination) and tensile fracture of the tows. The combination of acoustic emission and X-ray micro-computed tomography analysis provides an insight for further elucidation of the progressive damage initiation/evolution and failure mechanism of composites.

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Section: Resultsmentioning

confidence: 89%

Flexural progressive damage and failure behavior of carbon-aramid/epoxy hybrid woven composites

Yin

Zhou

Zhang

et al. 2020

Journal of Composite Materials

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“…There are many studies on the impact behavior and CAI behavior of sandwich composites at home and abroad. [5][6][7][8] Some researchers investigated the quasi-static indentation behavior of fiber reinforced with composite. Luo et al [9] studied the damage of composite materials in the quasi-static indentation and found that the specimen size and support conditions have little influence on the maximum load.…”

Section: Introductionmentioning

confidence: 99%

Study on impact behavior of glass fiber/PVC curved sandwich structure composites

Liu

Gao

2022

Polymer Composites

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Composite materials have the characteristics of light weight, high strength, high modulus, and corrosion resistance. In this article, glass fiber/PVC curved sandwich structure composites with three curvature radiuses (80, 150, and 260 mm) and different sandwich structures were prepared by vacuum assisted resin transfer molding. The specimens were subjected to quasi-static indentation test and drop hammer impact test. The influence of curvature radius and ply sequence on the impact behavior of composites were analyzed by comparing the load displacement curve, pit depth, and energy loss. The compression after impact of specimens with different curvature radius and structure was carried out to explore the damage limit and toughness of composites. It is found that the maximum tensile properties of sandwich specimens are determined by the degree of resin infiltration into PVC foam panels. The impact performance is mainly attributed to the laying sequences of reinforcement. The instantaneous impact performance of free falling body is greatly affected by the curvature radius, and the post impact compression performance of sandwich composites is increased with increase of the curvature. The research could provide a theoretical basis for the application of combining curved surface and sandwich structure composites.

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Implementation of Supervised Classification Method of Acoustic Emission Signals: Damage Mechanisms Identification of Non-hybrid and Hybrid Flax Fibre Composites

et al. 2022

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Effect of Thickness and Denting Behavior of Glass/Epoxy Laminates Subjected to Quasi-Static Indentation (QSI) Loading Under Acoustic Emission Monitoring

Cited by 7 publications

References 28 publications

Flexural progressive damage and failure behavior of carbon-aramid/epoxy hybrid woven composites

Flexural progressive damage and failure behavior of carbon-aramid/epoxy hybrid woven composites

Study on impact behavior of glass fiber/PVC curved sandwich structure composites

Implementation of Supervised Classification Method of Acoustic Emission Signals: Damage Mechanisms Identification of Non-hybrid and Hybrid Flax Fibre Composites

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