Effect of local microstructure on the indentation induced damage of a fiber reinforced composite

Kavouras, P.; Dragatogiannis, Dimitrios A.; Batsouli, Despoina I.; Charitidis, Costas A.

doi:10.1016/j.polymertesting.2017.05.023

Cited by 15 publications

(9 citation statements)

References 21 publications

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“…A Hysitron Tribolab® Instrument, equipped with a standard three-sided pyramidal Berkovich tip, was used for the nanomechanical tests, at a load range from 1 μN to 30 mN with simultaneous recording of the displacement. A standard fused silica sample was used to calibrate the area function of the Berkovich indenter tip prior measuring [18][19].…”

Section: Nanoindentation Testingmentioning

confidence: 99%

Novel CNTs grafting on carbon fibres through CVD: investigation of epoxy matrix/fibre interface via nanoindentation

et al. 2019

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Carbon Fibre Reinforced Polymers (CFRPs) have spread to a broad range of sectors including automobile, aeronautics and space industry the last decades. Recently, the emergence of new requirements for improved smart properties and functionalities have been main drivers to the introduction of novel methodologies and optimization of processes. A new approach of functionalizing CFs is the in-situ grafting of carbon nanotubes (CNTs) onto the surface of fibres, through chemical vapour deposition (CVD). In this study, CFRPs were manufactured via Vacuum Assisted Resin Transfer Molding (VARTM) and characterized by microscopy techniques through their cross-section. The effect of CNTs in-situ grafting onto the CFs on the mechanical behavior of the composite was studied both in micro- and macro-scale level, through instrumented indentation technique and tensile testing. The mechanical behaviour of the composite with the CNTs in-situ grafted onto the CFs was compared with CNTs-modified composites, containing CNTs in the epoxy matrix. Comparing the nanomechanical properties with conventional mechanical testing, the enhancement of mechanical behaviour was revealed for the case of the CNTs-modified composite. Additionally, an increased interfacial adhesion between the CNTs-functionalised CFs and the polymer matrix was observed, indicating that CNTs contribute to an enhanced bonding between matrix and CFs.

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Section: Nanoindentation Testingmentioning

confidence: 99%

Novel CNTs grafting on carbon fibres through CVD: investigation of epoxy matrix/fibre interface via nanoindentation

et al. 2019

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“…In 2011, Sánchez et al measured the mechanical properties of carbon nanofibers/epoxy nanocomposites by nanoindentation method [27]. In 2017, Kavouras et al used grid nanoindentation testing to explore the effect of local microstructure on the indentation induced damage of a fiber reinforced composite [28]. Additionally, creep of polymer and its composites is one of the significant mechanical behaviors that influence its service life, especially at the high-temperature environment.…”

Section: Introductionmentioning

confidence: 99%

Characterization of mechanical properties of epoxy/nanohybrid composites by nanoindentation

Zhang

Qian

et al. 2020

Nanotechnology Reviews

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AbstractThe carbon nanofibers and molybdenum disulfide (CNF-MoS2) nanohybrid material was fabricated and incorporated into epoxy resin to form the nanocomposite coating. Firstly, microstructure observation shows that each CNF was uniformly wrapped up with MoS2 nanosheets, and the nanohybrids were well dispersed in the coating. Then, nanoindentation experiments were carried out to explore the effect of the CNF-MoS2 nanohybrids on the mechanical properties of the epoxy resin coating. The results demonstrate that elastic modulus, hardness and creep deformation resistance of the CNF-MoS2 epoxy resin coating are greatly increased in comparison with both pure epoxy resin and MoS2 epoxy resin coatings. Finally, the underlying mechanism of high-performance tribological behavior of the nanocomposites is analyzed accordingly. It can be concluded that the wrapped structure with MoS2 sheets growing on the surface of CNF increases the contact area and reduces the friction coefficient of the composite coating, while the wear resistance of the nanocomposite coating is also greatly improved due to the superior high hardness of CNF.

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“…Some studies focused on the nanomechanical behaviors and scratch damage in polymer composites at the nanoscale [1,21,22]. However, they mainly focused on the characterization of the topography and dimension of the fiber-matrix interface/interphase structure in fiber-reinforced resin matrix composites [23][24][25]. Kavouras et al studied a commercial carbon fiber (CF)-reinforced epoxy matrix composite in order to study the induced damage mechanisms [23].…”

Section: Introductionmentioning

confidence: 99%

Nanomechanical Properties of a Bicomponent Epoxy Resin via Blending with Polyaryletherketone

Liu

Wang

et al. 2019

J. Compos. Sci.

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In order to investigate the nanomechanical behaviors and nanotribological properties of bicomponent epoxy resin (BE) blends, which were filled with thermoplastic polyaryletherketone (PAEK) powders, nanoindentation and nanoscratch tests were performed. The brittle fractured morphologies of bicomponent epoxy resin blends were studied. The microhardness and elastic modules of the materials were measured using the nanoindentation technology. The hardness, elastic modulus, and other mechanical properties of materials on a nanoscale were determined. Nanoindentation and scratch experiments showed that the indentation response is dominated by plastic deformation. The microhardness is the lowest as the content of PAEK powders is increased to 30 parts per hundred parts of resin (phr), while that of the neat bicomponent epoxy resin specimen is the highest. Furthermore, the pristine bicomponent epoxy resin (BE) exhibited better load-carrying and indentation recovery capacity than the other three samples. The nanoscratch results indicate that the frictional coefficient of the BE/PAEK-30 blend is the lowest, and while that of the pristine bicomponent epoxy resin is the highest, with better scratch/wear resistance.

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Effect of local microstructure on the indentation induced damage of a fiber reinforced composite

Cited by 15 publications

References 21 publications

Novel CNTs grafting on carbon fibres through CVD: investigation of epoxy matrix/fibre interface via nanoindentation

Novel CNTs grafting on carbon fibres through CVD: investigation of epoxy matrix/fibre interface via nanoindentation

Characterization of mechanical properties of epoxy/nanohybrid composites by nanoindentation

Nanomechanical Properties of a Bicomponent Epoxy Resin via Blending with Polyaryletherketone

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