Flexural damage behavior of carbon fiber three-dimensional braided composites using acoustic emission and micro-CT

Zhou, Wei; Zhang, Peng-fei; Yin, Han-fei; Shang, Ya-jing

doi:10.1088/2053-1591/ab43f1

Cited by 14 publications

(9 citation statements)

References 37 publications

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“…In order to understand the damage mechanism and failure mode of the specimen, it is better to combine the above AE analysis with the scanning images of micro-CT. Based on the micro-CT images, it can be seen that damage appears at the compression part of the specimen, as shown in Figure 11b, the fiber in top surface of the specimen appears fracture damage. However, from Figure 11c, the bottom fiber is basically not damaged, so the surface of compression side (specimen's top side) is more serious than that of the back side [30] .…”

Section: Micro-ct Analysis For Composite Specimensmentioning

confidence: 99%

“…In addition, W. Zhou combined AE and micro-CT for experimental testing and mechanics analysis, the results indicated that the combination of micro-CT and AE could achieve a better monitoring during testing process. [30] Recently, there are a few different materials were put into thermoplastic matrix to improve mechanical properties, such as chopped carbon fibers, kevlar fibers, carbon nanotubes and glass fibers, extending application areas and design flexibility. [31,32] However, majority of researches have been reported on performance of printed composites by analyzing the process parameters, a few papers have been conducted to give a thought to the effect of flaw in the composite to characterize the damage and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Micro-ct Analysis For Composite Specimensmentioning

confidence: 99%

Section: Introductionmentioning

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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“…Zehnder 15 explored the use of Micro-CT for thin laminates in bending and proposed an experimental technique that leads to high quality Micro-CT scans. Zhou et al 16 observed the internal characteristics and damages of the fractured composite specimens by Micro-CT and investigated the flexural deformation and failure behavior by AE characteristics, strain and deformation fields, and microscopic damage morphology. It should be noted that the damage behaviors of 3D printed composites have gained widespread attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the mechanical behavior and damage of 3D printed composites under three-point bending

Zhang

Pan

et al. 2022

Journal of Composite Materials

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Three-dimensional (3D) printing has been triumphantly applied for the manufacture of various composite components. In this work, acoustic emission (AE), X-ray micro-computed tomography (Micro-CT) are used in conjunction with digital image correlation (DIC) measurement to investigate the mechanical behaviors of 3D printed continuous fiber reinforced composites under three-point bending test. Meanwhile, several mechanical experiments are carried out to study the flexural properties of three kinds of composite specimens, among which the specimens with larger glass fiber content exhibit more superior mechanical properties. Furthermore, AE response characterizations and microscopic damage morphology are also examined. In consequence, the complementary nondestructive testing (NDT) technology combining AE, DIC, and Micro CT is successfully applied to evaluate the mechanical behaviors of 3D printed composites, and the flexural deformation and damage are comparatively investigated for different composite specimens. The cross-validation results of cluster analysis (k-means), K-Nearest Neighbor (KNN) and principal component analysis (PCA) show that AE parameters including frequency, amplitude, and RA value (rise time divided by peak amplitude) are closely associated with the damage process of different specimens. The results show that the PCA can confirm the selected K-means cluster analysis parameters (peak frequency and peak amplitude) and the dimensionality reduction effects of 20% glass fiber specimens have the best results, indicating that the proportion of the principal components extracted can represent the original parameters is 81%. It was also confirmed that the supervised learning KNN algorithm corresponding to different damage patterns can verify the unsupervised learning k-means cluster. Correspondingly, the strain fields characterized by DIC are reasonably matched with the AE signal responses. In addition, the critical damage and delamination mechanisms of the 3D printed continuous fiber reinforced composites are clearly revealed by Micro-CT characterization.

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“…In addition, the molding method of carbon/carbon fiber composite materials is relatively easy to achieve. Carbon/carbon fiber composites can be divided into low-density carbon/carbon fiber composites (0.1-0.4 g/cm 3 ) [3][4][5] and high-density carbon/carbon materials (1.0-1.8 g/cm 3 ) [6][7][8][9]. is paper focuses on low-density carbon/carbon fiber composites.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Study on Thermal Conductivity, Electrical Properties, and Mechanical Properties of the Lightweight Carbon/Carbon Fiber Composite

Wang

Yang

et al. 2020

Journal of Chemistry

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In this paper, lightweight carbon/carbon fiber composite thermal field insulation materials were fabricated by the process method of long carbon fiber airflow netting-needle punching forming felt-resin impregnation-molding curing-high-temperature carbonization and graphitization. The microscopic morphology, conductivity, bending strength, and thermal conductivity of carbon/carbon fiber composites were measured by using the scanning electron microscope (SEM), four probes, electronic universal testing machine, and thermal analyzer. The results show that the long carbon fiber in the carbon/carbon fiber composite forms a three-dimensional structure of X-Y-Z with a density of 0.16 ± 0.02 g/cm3, which makes the composite material have excellent thermal insulation performance at high temperature, and the conductivity is 1452.4 S/m (plane direction) and 182.8 S/m (perpendicular to the plane direction), the compressive strength is 0.2 MPa (plane direction) and 1.31 MPa (perpendicular to the plane direction), the bending strength is 0.24 MPa (plane direction) and 1.1 MPa (perpendicular to the plane direction), and the thermal conductivity is 0.076 W/(mK) (25°C) and 0.17 W/(mK) (1200°C), respectively. The above process methods and test results will provide the application of the carbon/carbon fiber composite in the solar polysilicon furnace, single crystal silicon furnace, semiconductor furnace, sapphire furnace, fiber drawing furnace, and high-end metallurgical heat treatment furnaces, as well as applications in other high-temperature insulation environments, and also provide some suggestions in these insulation applications.

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Flexural damage behavior of carbon fiber three-dimensional braided composites using acoustic emission and micro-CT

Cited by 14 publications

References 37 publications

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

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

Experimental investigation on the mechanical behavior and damage of 3D printed composites under three-point bending

Fabrication and Study on Thermal Conductivity, Electrical Properties, and Mechanical Properties of the Lightweight Carbon/Carbon Fiber Composite

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