The effect of halloysite nanotube modification on wear behavior of carbon‐aramid fiber reinforced hybrid nanocomposites

The poor interfacial adhesion of aramid fiber and matrix limits the application of the final composites. In this study, a series of the sulfone-functionalized poly( p-phenylene terephthalamide) (SPPTA) copolymers were satisfactorily synthesized and the effects of polymerization conditions (contents of the additional monomer and the cosolvent LiCl, molar concentration and ratio of the monomer, reaction temperature and time) on the molecular weight of the copolymer were discussed. The introduction of the sulfone group in aromatic polyamides not only increased the polarity of poly( p-phenylene terephthalamide) (PPTA) but destroyed the regular arrangement of the molecular chains, which greatly improved the surface free energy and the solubility of the polymers in organic solvents. The polymer maintained excellent thermal and interfacial properties. Compared with the PPTA fiber/epoxy composites, the interfacial shear strength (IFSS) of SPPTA fiber-reinforced epoxy composites reached 43.5 MPa, with a significantly enhancement of 20.8%, implying that the study provided an effective method to achieve highly interfacial adhesion of aramid fiber-reinforced composites.

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Modeling of Bridging Law for Bundled Aramid Fiber-Reinforced Cementitious Composite and its Adaptability in Crack Width Evaluation

Materials ◽

10.3390/ma14010179 ◽

2021 ◽

Vol 14 (1) ◽

pp. 179

Author(s):

Daiki Sunaga ◽

Takumi Koba ◽

Toshiyuki Kanakubo

Keyword(s):

Fiber Orientation ◽

Crack Width ◽

Volume Fraction ◽

Characteristic Point ◽

Crack Opening ◽

Aramid Fiber ◽

Cementitious Composite ◽

Fiber Reinforced ◽

Cross Sectional ◽

Bridging Law

Tensile performance of fiber-reinforced cementitious composite (FRCC) after first cracking is characterized by fiber-bridging stress–crack width relationships called bridging law. The bridging law can be calculated by an integral calculus of forces carried by individual fibers, considering the fiber orientation. The objective of this study was to propose a simplified model of bridging law for bundled aramid fiber, considering fiber orientation for the practical use. By using the pullout characteristic of bundled aramid fiber obtained in the previous study, the bridging laws were calculated for various cases of fiber orientation. The calculated results were expressed by a bilinear model, and each characteristic point is expressed by the function of fiber-orientation intensity. After that, uniaxial tension tests of steel reinforced aramid-FRCC prism specimens were conducted to obtain the crack-opening behavior and confirm the adaptability of the modeled bridging laws in crack-width evaluation. The experimental parameters are cross-sectional dimensions of specimens and volume fraction of fiber. The test results are compared with the theoretical curves calculated by using the modeled bridging law and show good agreements in each parameter.

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Axial compressive performance of laminated bamboo column with aramid fiber reinforced polymer

Composite Structures ◽

10.1016/j.compstruct.2020.113398 ◽

2021 ◽

Vol 258 ◽

pp. 113398

Author(s):

Zhen Wang ◽

Haitao Li ◽

Benhua Fei ◽

Mahmud Ashraf ◽

Zhenhua Xiong ◽

...

Keyword(s):

Aramid Fiber ◽

Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Reinforced Polymer ◽

Laminated Bamboo ◽

Compressive Performance

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Interlaminar mechanical properties of nano- and short-aramid fiber reinforced glass fiber-aluminum laminates: a comparative study

Journal of Materials Science ◽

10.1007/s10853-021-06003-z ◽

2021 ◽

Author(s):

Xinyu Qi ◽

Xiaopeng Wu ◽

Youkun Gong ◽

Huiming Ning ◽

Feng Liu ◽

...

Keyword(s):

Mechanical Properties ◽

Comparative Study ◽

Glass Fiber ◽

Aramid Fiber ◽

Fiber Reinforced

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Wear Mechanism of Unidirectionally Oriented Fiber-Reinforced Plastics

Journal of Lubrication Technology ◽

10.1115/1.3453233 ◽

1977 ◽

Vol 99 (4) ◽

pp. 401-407 ◽

Cited By ~ 24

Author(s):

T. Tsukizoe ◽

N. Ohmae

Keyword(s):

Mechanical Properties ◽

Carbon Fibers ◽

Wear Behavior ◽

High Modulus ◽

Fiber Reinforced ◽

Reinforced Plastics ◽

Sliding Direction ◽

Oriented Fiber ◽

Fiber Reinforcements ◽

Fiber Reinforced Plastics

Wear between unidirectionally oriented fiber-reinforced-plastics and mild steel has been investigated. The wear behavior was found to be greatly influenced by the sliding direction, the mechanical properties of fiber-reinforced-plastics and by the tribological properties of fiber-reinforcements or matrices. A summarization of wear-resistance of seven different kinds of fiber-reinforced-plastics signified that the epoxy resin reinforced with high-modulus carbon fibers was the best wear-resistant fiber-reinforced-plastics.

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