A quantitative assessment of the damage mechanisms of CFRP laminates interleaved by PA66 electrospun nanofibers using acoustic emission

Mohammadi, Reza; Najafabadi, Mehdi Ahmadi; Saghafi, Hamed; Saeedifar, Milad

doi:10.1016/j.compstruct.2020.113395

Cited by 42 publications

(24 citation statements)

References 44 publications

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“…The magnified view of Figure 12b is shown in Figure 12c. The debonding decreases the stress around the crack‐tip and acts as the toughening mechanism 82 . A lower crack length is formed in the case of 0.1 wt% SCF‐GE than neat GE, as represented in Figure 12d.…”

Section: Resultsmentioning

confidence: 95%

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

Dasari

Lohani

Prusty

2021

J of Applied Polymer Sci

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Utilizing recycled or short fibers for making useful engineering composite component is a present research trend and requirement. Current research work explicates the effect of short carbon fibers (SCF) used as secondary reinforcement in woven glass/epoxy hybrid composites and evaluates their mechanical properties. Different concentrations (0.1, 0.3, and 0.5 wt%) of SCF were incorporated to assess the tensile, flexural, and interlaminar fracture toughness (Mode I and II) of the resulted composites. Composites with 0.1 wt% SCF showed 29.02% and 16.08% increment in the tensile and flexural strength, respectively. For Mode I and Mode II interlaminar fracture toughness tests, 0.1 wt% SCF‐GE samples showed the highest strain energy release rate. Double cantilever beam specimens were used for Mode I testing and an improvement of 13.49% in GIC value was observed. End‐notched flexure method was used for the Mode II tests, and 0.1 wt% SCF‐GE samples showed 20.45% increase in GIIC values. This paper explains the various reasons and mechanisms for obtaining such results. Scanning electron microscopy of the fractured surfaces was carried out to perceive the diverse failure micro‐mechanisms that could have been involved.

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Section: Resultsmentioning

confidence: 95%

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

Dasari

Lohani

Prusty

2021

J of Applied Polymer Sci

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“…Compared with carbon fiber‐reinforced composites, the total number of AE events of specimens reinforced by nanoparticles was lower by 27%, 32%, and 15%, respectively. This indicates less damages occurred in the composites reinforced by nanoparticles 31 . However, the characteristic parameter of energy can not fully reflect the real AE response behavior of composite specimens during damage evolution, so it is necessary to analyze and process AE signals using multiparameters 32 …”

Section: Resultsmentioning

confidence: 99%

“…This indicates less damages occurred in the composites reinforced by nanoparticles. 31 However, the characteristic parameter of energy can not fully reflect the real AE response behavior of composite specimens during damage evolution, so it is necessary to analyze and process AE signals using multiparameters. 32…”

Section: Ae Characteristicsmentioning

confidence: 99%

Quantitative assessment of damage evolution of carbon fiber‐reinforced polymer laminates embedded with different nanoparticles using acoustic emission

Zhou

Yang

et al. 2021

J of Applied Polymer Sci

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Nanoparticles can be used to optimize the interface structure and improve the mechanical properties of fiber‐reinforced composites. Herein, the damage evolution of carbon fiber‐reinforced composites embedded with different nanoparticles has been investigated using acoustic emission (AE) technology. Principal component analysis is used to reduce the dimension of AE parameters. Combining fuzzy C‐means (FCM) clustering with hierarchical clustering can improve the clustering quality, which is helpful to apply FCM results to the quantitative evaluation of damage. For multiwalled carbon nanotubes, graphene, and cellulose nanofibres, the cumulative AE energy of matrix cracking increases by 39.29%, 51.12%, and 53.69%, respectively, that of fiber/matrix debonding increases by 13.5%, 118.5% and 56.58%, and that of fiber breakage decreases by 97.9%, 94.32%, and 87.6%, respectively. The addition of nanoparticles helps to improve the stiffness and toughness of epoxy resin, and restricts crack propagation, thus enhancing the interfacial properties. AE technology can successfully help quantitatively evaluate the damage behavior and the mechanism of different multiscale reinforced composites. AE characteristic responses within the composites are consistent with scanning electron microscopy results.

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“…Laminated composites, i.e., carbon/epoxy composites, have been extensively utilized in a variety of structural applications owing to their superior mechanical qualities, manufacturability, and corrosion resistance when compared to traditional materials such as metals. In a variety of structural applications, such as vehicles, aerospace, ground, and wind turbines, they are considered ideal metal substitutes [ 1 , 2 , 3 , 4 , 5 ]. The performance properties of polymer matrix composites are primarily influenced by the mechanical characteristics of the composites’ individual components (matrix phase and reinforcement phase), the loading amount of each component, the matrix and reinforcement interfacial bonding, fiber alignments, and other factors [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient Improvement in Fracture Toughness of Laminated Composite by Interleaving Functionalized Nanofibers

et al. 2021

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Functionalized polyacrylonitrile (PAN) nanofibers were used in the present investigation to enhance the fracture behavior of carbon epoxy composite in order to prevent delamination if any crack propagates in the resin rich area. The main intent of this investigation was to analyze the efficiency of PAN nanofiber as a reinforcing agent for the carbon fiber-based epoxy structural composite. The composites were fabricated with stacked unidirectional carbon fibers and the PAN powder was functionalized with glycidyl methacrylate (GMA) and then used as reinforcement. The fabricated composites’ fracture behavior was analyzed through a double cantilever beam test and the energy release rate of the composites was investigated. The neat PAN and functionalized PAN-reinforced samples had an 18% and a 50% increase in fracture energy, respectively, compared to the control composite. In addition, the samples reinforced with functionalized PAN nanofibers had 27% higher interlaminar strength compared to neat PAN-reinforced composite, implying more efficient stress transformation as well as stress distribution from the matrix phase (resin-rich area) to the reinforcement phase (carbon/phase) of the composites. The enhancement of fracture toughness provides an opportunity to alleviate the prevalent issues in laminated composites for structural operations and facilitate their adoption in industries for critical applications.

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A quantitative assessment of the damage mechanisms of CFRP laminates interleaved by PA66 electrospun nanofibers using acoustic emission

Cited by 42 publications

References 44 publications

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

Quantitative assessment of damage evolution of carbon fiber‐reinforced polymer laminates embedded with different nanoparticles using acoustic emission

Efficient Improvement in Fracture Toughness of Laminated Composite by Interleaving Functionalized Nanofibers

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