Effects of carbon nanotubes on open-hole carbon fiber reinforced polymer composites

Han, Kang-ning; Zhou, Wei; Qin, Reng; Wang, Guang-fei; Ma, Lianhua

doi:10.1016/j.mtcomm.2020.101106

Cited by 21 publications

(12 citation statements)

References 32 publications

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“…The carbon fabric reinforced MWCNT/epoxy structural composites were developed by hand lay-up technique. [22] Eight layers of CF/Epoxy-MWCNT composites were prepared by brushing the affixed mass of Epoxy/MWCNT/curative at each fiber layer until the 8th layer. Finally, the whole setup was compression molded in a hydraulic press at room temperature for 48 h. Figure 1 shows the schematic of the flow chart for the preparation of CNT reinforced polymer matrix nanocomposite (PMNC) and laminated composite.…”

Section: Materials Details and Sample Preparationsmentioning

confidence: 99%

“…[21,22] The addition of MWCNT reinforcement improved the fracture toughness and retarded the damage propagation of composites by increasing their tensile load-carrying capability. [22] The failure of laminates was mainly due to fiber tensile damage (DAMAEFT and HSNFTCRT), matrix tensile damage (HSNMTCRT), and compressive matrix damage (HSNMCCRT). Further, the different damage contours at 17 kN loading (point C) for different wt% MWCNT laminates are also shown in toughness of laminated composites) was more in the case of 0.5% and 1.0% CNT loaded OHT samples compared with that of CF/neat epoxy.…”

Section: Damage Propagation and Failuresmentioning

confidence: 99%

“…They further concluded that CNT reinforcements to the matrix delayed the propagation of the damage and enriched the resistance and fracture toughness of the laminates. Using acoustic emission technique, digital image relationship, and FEA, the damage progression of open-hole carbon laminated composites with or without MWCNTs was studied by Han et al [22] They concluded that the addition of MWCNT minimized the stress concentration, maximized laminate strength and fracture interface rigidity, and removed micro-cracks. Apart from these two groups, not enough studies have been reported so far that particularly concentrated on the damage modeling of MWCNT-modified ternary epoxy/ woven carbon fiber (CF) composites, and in that respect, an integrated approach is taken in this study.…”

Section: Introductionmentioning

confidence: 99%

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Influence of multiwalled carbon nanotube on progressive damage of epoxy/carbon fiber reinforced structural composite

et al. 2022

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The present work aims to demonstrate the effect of multiwalled carbon nanotube (MWCNT) on mechanical behavior and damage of woven carbon fiber/epoxy composites through experimental characterizations and multi-scale modeling. Tensile tests were conducted for MWCNT/epoxy nanocomposites, and carbon nanotube (CNT) reinforced laminated open hole composites with different MWCNT weight ratios. The tensile modulus in CNT/epoxy nanocomposite was enhanced by 15.0%, 37.86%, and 22.86% for MWCNT reinforcement of 0.5%, 1.0%, and 1.5% wt, respectively. The corresponding improvement of tensile modulus for woven composites was 3.45%, 10.25%, and 1.53%; whereas tensile strength was increased by 19.76%, 25.78%, and 6.70%. The enhancement of tensile modulus and strength was less for 1.5% wt MWCNT laminates due to the formation of MWCNT agglomeration. The effective elastic isotropic/orthotropic properties for nanocomposite/woven composite were estimated through Mori-Tanaka approach and numerical homogenization. The finite element simulations were performed with Hashin's damage model and extended finite element method-based crack growth study. The delaminations between layers have been demonstrated through cohesive zone modeling. Damage propagation, interface delamination, and fiber/ matrix failure were demonstrated by numerical simulations in line with scanning electron microscope observations.

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Section: Materials Details and Sample Preparationsmentioning

confidence: 99%

Section: Damage Propagation and Failuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of multiwalled carbon nanotube on progressive damage of epoxy/carbon fiber reinforced structural composite

et al. 2022

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“…The AE signals of specimen A during flexural tests take place according to four kinds: low-frequency and low-amplitude, medium-frequency and high-amplitude, medium-frequency and lowamplitude and finally high-frequency, corresponding to matrix bucking, interfacial debonding, delamination and fiber breakage respectively. [43] However, the clustering of specimen B is divided into three categories, and there is no debonding phenomenon compared A. The reason may be that the adhesion between KF and the matrix is lower than that of GF, which directly leads to delamination damage.…”

Section: Gray Relational Analysis and K-means Clusteringmentioning

confidence: 99%

Flexural damage and failure behavior of 3D printed continuous fiber composites by complementary nondestructive testing technology

et al. 2022

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It is necessary to investigate the flexural damage and evolution behavior of 3D printed continuous fiber-reinforced composites. In this paper, acoustic emission technology (AE) is used to monitor the bending damage of 3D printed Kevlar fiber (KF) and glass fiber (GF)-reinforced composites in real time, and gray relational analysis (GRA) and k-means are utilized for clustering analysis of AE signals. Subsequently, micro-computed tomography (micro-CT) is employed to identify the internal damage degree. For 3D printed specimens, matrix buckling and interface failure are the main failure modes, and the number of matrix and interface damage is more than that of fiber damage, and the surface of compression side (specimen's top side) is more serious than that of the back side. KF-reinforced composites have poor delamination resistance and more serious damage than that of GF. The average maximum stress of GF and KF-reinforced specimens is 56.37 and 42.15 MPa, and the average bending modulus is 1576.42 and 1395.36 MPa, respectively. The combination of complementary detection methods is beneficial to the nondestructive evaluation and health monitoring of 3D printed composite materials.

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“…The results indicate that the properties of open-hole carbon fiber-reinforced composite laminate specimens can be enhanced by adding appropriate CNTs. 33 Due to the enhancement of interfacial resistance and the effective stress transfer between CNTs and matrix, the addition of CNTs to matrix can enhance the failure load. 26,27,30 Each curve can absolutely describe the damage evolution process under tensile load.…”

Section: Characterization Of Mechanical Propertiesmentioning

confidence: 99%

Progressive damage and tensile failure of open‐hole carbon fiber polymer composites reinforced by carbon nanotubes

Han

Zhou

Ding

2022

J of Applied Polymer Sci

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Progressive damage and tensile failure of open‐hole carbon fiber/carbon nanotube reinforced composites with different off‐axis angles were detected by acoustic emission and Micro‐CT. K‐mean clustering algorithm can be utilized to post‐process signals of acoustic emission. Three critical points including linear growth point, near maximum load point and failure point, were selected to study progressive damage. Results indicated that stiffness variable decreased with the increase of off‐axis angle. When the off‐axis angle was 0°, higher initial stress and catastrophic brittle fracture characteristics can be obtained, whereas pseudo‐ductile behavior can be observed when off‐axis angles were 30° and 45° because of the alignment of yarn (fiber trellising) and the matrix plasticity. Due to the symmetrical structure of plain texture, there was a very interesting phenomenon that the tensile strength of composite specimen with 45° off‐axis angle was 23.65% higher than that of the specimen with an off‐axis angle of 30°. In the second stage of loading, the slope drop sharply when the load reached first key point, and Kaiser Effect can be observed. Acoustic emission technology and Micro‐CT method are beneficial to damage assessment of complex composites.

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Effects of carbon nanotubes on open-hole carbon fiber reinforced polymer composites

Cited by 21 publications

References 32 publications

Influence of multiwalled carbon nanotube on progressive damage of epoxy/carbon fiber reinforced structural composite

Influence of multiwalled carbon nanotube on progressive damage of epoxy/carbon fiber reinforced structural composite

Flexural damage and failure behavior of 3D printed continuous fiber composites by complementary nondestructive testing technology

Progressive damage and tensile failure of open‐hole carbon fiber polymer composites reinforced by carbon nanotubes

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