Mechanical failure analysis of pultrusion glass fiber pipe based on acoustic emission technology

Yu, Lichao; Liu, Guiyu; Wang, Wei; Hamada, Hiroyuki; Yang, Yuqiu

doi:10.1002/pc.27236

Cited by 8 publications

(2 citation statements)

References 24 publications

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“…By using hydrophobic silicon powder and graphene nanoplatelets, maximum compressive and flexural strengths of 62.6 MPa and 8.9 MPa, respectively, were achieved in structural health monitoring of cementitious composites 25 . Yu et al 26 fabricated a square tube of glass fiber/unsaturated polyester composite and analyzed the damage modes and mechanical properties using AE technology. Their results show that the fiber content of the unidirectional fiber layer is much higher than that of the mat layer.…”

Section: Introductionmentioning

confidence: 99%

Structural health monitoring of natural fiber‐based hybrid composites

2023

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The purpose of this article is to evaluate mechanical behavior, detect early damage, and understand failure mechanisms of natural fiber composites using acoustic emission testing (AE). Natural fiber composites are increasingly used in various applications due to their low cost, renewable and biodegradable nature, and excellent mechanical properties. However, their mechanical behavior and failure mechanisms are complex and must be better understood, and nondestructive testing methods are required to evaluate their performance. The article discusses the AE behavior of banana‐ramie‐epoxy composites in tensile tests for the first time. The composites were fabricated by compression molding with 4‐layer banana‐ramie epoxy at 0° stacking. The AE signals were recorded and analyzed during the test using a piezoelectric high‐frequency sensor to identify the different types of AE events. The results showed that the composites exhibited high levels of AE activity at different stages. AE signals were closely related to the damage mechanisms occurring in the composites, such as fiber/matrix debonding, fiber breakage, and matrix cracking. This research results also suggest that AE can help optimize the design and performance of novel composites in practical applications.

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Section: Introductionmentioning

confidence: 99%

Structural health monitoring of natural fiber‐based hybrid composites

2023

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“…For example the Fiber Bragg grating sensor is used to nd the crack propagation and composite delamination of FRP composites [12,13,14]. Similarly acoustic emission sensor is one of the non-destructive techniques to identify the different failures such as matrix failure, debonding and ber fracture in FRP composite pipe structures [15,16]. Most of the researchers have studied various failures in laminates while conducting different experimentation like machining and mechanical testing.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of spirally stacked fiber reinforcement on the torsional behavior of a polymer composite rod by AE analysis

Lakshmankumar,

Prakash

2023

J Braz. Soc. Mech. Sci. Eng.

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The ber orientation of composite materials has a major impact on the mechanical properties, especially the torsional ability of polymer composites. Automobile and aerospace industries are continually on the search for better polymer composite materials to replace rotating metal components. In this research work, spirally stacked basalt and glass ber polymer composite solid rods are fabricated by Vacuum Assisted Resin Transfer Molding (VARTM) method to study the torsional behavior under static torsional loading conditions. In order to predict the different failure initiation in the composite materials like matrix cracking, de-bonding and ber fracture, the Acoustic emission sensor and its signal analysis are used. Time domain, Frequency domain (Fast Fourier Transformation) and Discrete Wavelet Pocket Transformation methods are used to identify the approximate signal levels for different material failure modes. 'k'-means cluster analysis is also carried out to identify frequency spectrum related to the various failure mechanisms. The observed frequency ranges for different failures are 0 to 100 kHz for matrix failure, 100 to 240 kHz for debonding and 240 to 500 kHz for ber fractures. The time domain and FFT analysis results are observed to agree with the k-means clustering results and with fractrography of the tested samples.

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Study on shear behavior and acoustic emission characteristics of precast concrete segmental cover beams with large key teeth

Tian,

Liu,

Chen

et al. 2024

Structural Concrete

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The mechanical characteristics of segmental joints are pivotal in defining the comprehensive stress behavior of prefabricated assembled cover beams. In this research, direct shear tests were conducted on dry key‐tooth joints, and acoustic emission technology was employed for monitoring purposes. The shear failure mechanism was explored under a range of influential parameters. Building upon these observations, the study delved into the mechanical response of joints within segmental cover girders subjected to concurrent bending and shear forces. Specimen K‐3‐3 exhibited a higher shear carrying capacity compared to other specimens, indicating that the shear resistance of dry joints proportionally increases with the height of the specimen and the strength of the concrete. The carrying capacity of Specimen K‐4 was marginally lower than that of Specimens K‐3‐1 and K‐3‐2, suggesting that increasing the number of keys does not significantly impact the shear resistance of dry joints. Notably, Specimen K‐3 demonstrated exceptional shear carrying capacity, exhibiting minimal relative slip during failure, and streamlined the casting process. Consequently, these dry joints featuring large key teeth are deemed more appropriate for use as shear connectors in precast concrete segmental cover beams. Crack patterns in large key tooth precast concrete segmental cover beams propagate along the joints. A damage evolution model for the specimens, based on spatial b‐values and T‐values, visually depicts the damage extent in large key tooth precast concrete segmental cover beams. This model demonstrates excellent agreement with experimental results and provides a solid foundation for theoretical research and practical applications of large key tooth precast concrete segmental cover beams.

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Mechanical failure analysis of pultrusion glass fiber pipe based on acoustic emission technology

Cited by 8 publications

References 24 publications

Structural health monitoring of natural fiber‐based hybrid composites

Structural health monitoring of natural fiber‐based hybrid composites

Investigation of the effect of spirally stacked fiber reinforcement on the torsional behavior of a polymer composite rod by AE analysis

Study on shear behavior and acoustic emission characteristics of precast concrete segmental cover beams with large key teeth

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