Correlation analysis between acoustic emission signal parameters and fracture stress of wool fiber

Lu, Di; Yu, Weidong

doi:10.1177/0040517519838057

Cited by 8 publications

(6 citation statements)

References 19 publications

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“…The wavelet transform (WT) method is utilized to remove the background noise from the original AE signal in this paper. The processing steps are as follows23: (a) decompose the original signal into six levels with wavelet basis ‘Daubechies 5’ to generate the wavelet coefficients, including six detail coefficients and an approximate coefficient; (b) select the ‘soft thresholding’ function and ‘minimax’ algorithm to remove noises; (c) perform inverse WTs of the thresholded wavelet coefficients to obtain the de-noised signal. The original signal and de-noised signal are shown in Figure 3.…”

Section: Methodsmentioning

confidence: 99%

Determination of the strength and elongation distribution of single wool through fiber bundle testing based on acoustic emissions

Pan

2020

Textile Research Journal

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The method to obtain the breaking strength and elongation distribution of fiber through numerous single fiber tests is tedious and time-consuming. In the present work, a method based on acoustic emission (AE) signals generated by fiber fracture during the fiber bundle test has been developed for estimating the distribution of single wool breaking strength and elongation. AE detection is performed simultaneously during the fiber extension. According to the AE signal, it is proved that every individual fiber break can be detected, and the failure probability distribution of wool elongation can be obtained. Based on this, the single wool breaking strength is estimated from the tensile response of the fiber bundle, and then its distribution can be deduced. Finally, the distributions of breaking strength and elongation determined by the bundle test are compared with that obtained from the single fiber samples. The results show that the method developed in this work can be used to estimate the breaking strength and elongation of the single fiber within the bundle. Their cumulative probability distributions are similar to the results of single fiber sample tests, especially the distribution of the breaking strength.

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Section: Methodsmentioning

confidence: 99%

Determination of the strength and elongation distribution of single wool through fiber bundle testing based on acoustic emissions

Pan

2020

Textile Research Journal

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“…34 It also can be performed to predict the strength and elongation of the single fiber through AE signals. 35,36 The main motivation of this study was to propose a new method for predicting and characterizing the mechanical properties of natural fiber assemblies. For this purpose, single and bundle fibers of natural wool were stretched to break under simultaneous AE monitoring.…”

Section: Acoustic Emission Detection Of Bundle Fibersmentioning

confidence: 99%

Study on the tensile mechanical property of wool bundle fibers through fracture sounds detected by acoustic emission

Lu,

2023

Journal of Industrial Textiles

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This study deals with the prediction of the mechanical properties of wool bundle fibers and the characterization of the fracture performance of fiber fracture sound. Acoustic emission detection was used to record the fracture sound of wool fibers. According to the fracture sounds, the tensile properties of the bundle fibers were obtained. Acoustic emission provided a convenient method for obtaining fibers breaking elongation distribution. Based on the fiber bundle model and fiber breaking distribution, the fracture strength and elongation of bundle fibers could be predicted. Meanwhile, based on the correlation between the amplitude of fiber fracture sound and fiber breaking strength, the single fiber breaking strength could be predicted and the tensile properties of bundle fibers could also be obtained. The prediction results based on bundle fiber fracture sound were more similar to the measured results. Besides, the number of fibers within the bundle increased, the fiber interaction was also enhanced, and the bundle fiber strength prediction results were affected. This work was considered to have the potential of being used in the prediction of mechanical properties of natural fiber composites.

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“…The breaking strength of the wool fabric was determined by the breaking strength of the constituent wool fibers as well as the fabric structure. 34,38 However, the fabric structure was the same. The increase in the breaking strength was therefore due to the increased strength of the wool fibers.…”

Section: Appearance Of the Original And Treated Wool Samplesmentioning

confidence: 99%

Effect of polydopamine deposition on wool fibers on the construction of melanin

Huang

Zhang

Han

et al. 2022

J of Applied Polymer Sci

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The use of dopamine to synthesize melanin as a natural dye on fabrics has the disadvantages of complicated processing, long processing time, and high cost. This study simplifies the processing conditions of the oxidative polymerization of dopamine and develops wool fabric melanin coatings with different finishing effects by adjusting the reaction time. The results of computer color matching, ultraviolet (UV) protection properties, and color fastness indicated that the treated wool fibers were effectively dyed, and they achieved UV resistance properties comparable to those realized in other studies in a relatively short time. The degree of lightness (L) and UV protection factor of the treated fabric reached up to 13.3 and 80+, respectively. Samples W/PDA 60 and W/PDA 120 absorbed more than 95% of the UV light. The color fastness was greater than Grade 4. The Fourier infrared spectrum and X‐ray diffraction studies revealed that the chemical and crystalline structures of the wool fiber did not change significantly after the treatment. The breaking strength of samples W/PDA 60 and W/PDA 120 was about 50% higher than that of the original wool fabric. This efficient and simple method provides a feasible and promising solution for the color deepening and UV finishing of high value‐added wool products. It can be a potential choice for upgrading the printing and dyeing industries from the perspective of ecological protection.

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Correlation analysis between acoustic emission signal parameters and fracture stress of wool fiber

Cited by 8 publications

References 19 publications

Determination of the strength and elongation distribution of single wool through fiber bundle testing based on acoustic emissions

Determination of the strength and elongation distribution of single wool through fiber bundle testing based on acoustic emissions

Study on the tensile mechanical property of wool bundle fibers through fracture sounds detected by acoustic emission

Effect of polydopamine deposition on wool fibers on the construction of melanin

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