Static and dynamic mechanical responses of CaCO3 nanoparticle modified epoxy/carbon fiber nanocomposites

Eskizeybek, Volkan; Ulus, Hasan; Kaybal, Halil Burak; Şahi̇n, Ömer Sinan; Avcı, Ahmet

doi:10.1016/j.compositesb.2017.12.013

Cited by 76 publications

(36 citation statements)

References 33 publications

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“…The initial slope of the force-time curve represents the contact stiffness [52], and the initial slope of force-displacement curves represents the stiffness under impact loading [50,51,[54][55][56][57][58][59]. In materials, the displacement that occurs after the impact loading and the time reached when the force reaches the maximum are related to rigidity of materials [60][61][62].…”

Section: Variation Of Force Versus Displacementmentioning

confidence: 99%

“…If the impact energy is much more than the resilience of the material, the excess energy will be absorbed as either plastic deformation or damage formation [50]. It is known that damage development occurs as crack formation, crack propagation, delamination and fiber breakage for fiber-reinforced polymer composites [54,56,57]. While the amount of absorbed energy is directly related to damage formation, the rebounded energy is related to elastic properties in composite laminates [68][69][70].…”

Section: Time-dependent Energy Transfermentioning

confidence: 99%

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Investigation of the effect of surface crack on low-velocity impact response in hybrid laminated composite plates

Güneş

Şahi̇n

2020

J Braz. Soc. Mech. Sci. Eng.

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Composite materials can be damaged in the environments in which they are used, due to the loads they are exposed to or due to different effects on the production processes. The formation processes of these damages generally develop as crack formation or progress of the existing crack. For this reason, it is very important to investigate the behavior of the crack that occurs after the dynamic loads to which the composite materials are exposed. In this study, the dynamic behaviors of hybrid laminated composites with different surface crack geometries were investigated. Surface cracks with different crack depthto-thickness (a/t) and crack depth-to-crack width (a/c) ratios were machined upon hybrid composite laminates and subjected to low-velocity impact tests under 2 m/s, 2.5 m/s and 3 m/s impact velocities. The effect of different surface crack geometries upon variation of contact force versus time, variation of contact force versus displacement and variation of absorbed/rebound energy have been evaluated. The effect of surface crack geometry and impact velocity upon contact stiffness and bending stiffness was also evaluated. Damage formation during impact loading was examined by scanning electron microscopy and optical microscopy. After the evaluations, the damage behaviors caused by the dynamic loads depending on the initial surface crack geometry were examined in detail.

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Section: Variation Of Force Versus Displacementmentioning

confidence: 99%

Section: Time-dependent Energy Transfermentioning

confidence: 99%

Investigation of the effect of surface crack on low-velocity impact response in hybrid laminated composite plates

Güneş

Şahi̇n

2020

J Braz. Soc. Mech. Sci. Eng.

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“…Because of the micron size thickness of interphase, most of the toughening techniques employ principles of nanocomposites/nano‐reinforcements to improve delamination resistance. Resistance to delamination growth has been achieved through nanoparticle addition, films, and nanofiber reinforcements …”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of electrospun nanofiber reinforced/interleaved epoxy matrix composites—A review

et al. 2020

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Electrospinning has by far proved to be the most successful method to spin high aspect and surface area to volume ratio nanofiber for multidisciplinary applications. Its application, however, as reinforcement in fiber reinforced polymer matrix composites (FRPC's) started from interlaminar fracture toughness improvement through interleaving. Since then, its usage both in short fiber and nonwoven mat formation has been phenomenally increased to tailor mechanical properties. This review paper focuses on application of nanofiber in multiscale reinforced epoxy matrix composites for mechanical performance. After a brief overview of electrospinning and spinning parameters, it presents a case for nanofiber as reinforcement with attendant mechanisms to develop insight into nanocomposite performance. Next, it summarizes and shares findings of studies, carried out in last 10 years, seeking to enhance tensile, flexural, interlaminar toughness, impact, and fatigue properties of epoxy composites through electrospun nanofiber reinforcement. Finally, it presents a perspective to gain headways in nanofiber reinforced FRPC's research through a variety of processing and material variables.

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“…On the other hand, fluctuations and gradual load drops can be seen in the load-deflection curves of the B and BG. These formations can be the indication of crack formation and out of plane fiber breakage [30,36].…”

Section: Resultsmentioning

confidence: 99%

Nanographene inclusion effect on the mechanical and low velocity impact response of glass/basalt reinforced epoxy hybrid nanocomposites

Erkliğ

Doğan

2020

J Braz. Soc. Mech. Sci. Eng.

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In the present study, hybrid glass/basalt fiber composites containing nanographene (GnP) were manufactured for investigation of low velocity impact properties at the impact energy of 30 J. Also, their flexural and tensile properties were experimentally characterized. During the experiments, both laminate configurations as basalt and glass at outer and inner skins were treated for impact and mechanical tests. Failure mechanisms were analyzed with taking photographs over the front and rear sides of the samples and SEM observations on the impacted region after the impact tests. Results from this study indicated that incorporation of GnP at 0.1 wt% revealed a significant improvement in impact and mechanical properties indicating the better load transfer between GnP-matrix resin-fiber interactions.

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Static and dynamic mechanical responses of CaCO3 nanoparticle modified epoxy/carbon fiber nanocomposites

Cited by 76 publications

References 33 publications

Investigation of the effect of surface crack on low-velocity impact response in hybrid laminated composite plates

Investigation of the effect of surface crack on low-velocity impact response in hybrid laminated composite plates

Mechanical properties of electrospun nanofiber reinforced/interleaved epoxy matrix composites—A review

Nanographene inclusion effect on the mechanical and low velocity impact response of glass/basalt reinforced epoxy hybrid nanocomposites

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