Wavelet Analysis of Acoustic Emissions during Tensile Test of Carbon Fibre Reinforced Polymer Composites

Świt, Grzegorz; Adamczak, Anna; Krampikowska, Aleksandra

doi:10.1088/1757-899x/245/2/022031

Cited by 10 publications

(14 citation statements)

References 4 publications

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“…The tests aimed at finding predominant destructive processes that might occur during testing of reinforced concrete structures under operation. The database was verified on real facilities [25][26][27][28][29][30][31][32].…”

Section: Acoustic Emission Evaluation Of Gas Pipelinesmentioning

confidence: 99%

Acoustic Emission Method for Locating and Identifying Active Destructive Processes in Operating Facilities

Świt

2018

Applied Sciences

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Featured Application: The data collected can be the basis for determining the structural condition of the structure.Abstract: Durability, safety, and usability are the three foundations of structural reliability, vital in the economic and social context. As the locating and tracking of potential damage and evaluating its impact on the condition of the structure are part of service life assessment, relevant methods should be developed that would detect the onset of the deterioration process and enable the monitoring of its progress within the entire volume of the structure, not only in the areas selected in a subjective way. The acoustic emission (AE) method relying on the analysis of active destructive processes can be the best choice. This article reports the results of the application of the AE method for identifying active destructive processes and tracking their development during the routine operation of various types of structures.

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Section: Acoustic Emission Evaluation Of Gas Pipelinesmentioning

confidence: 99%

Acoustic Emission Method for Locating and Identifying Active Destructive Processes in Operating Facilities

Świt

2018

Applied Sciences

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“…During the consecutive production stages, the panels are exposed to defects and damage in the form of large pores, delamination, cracks and discontinuities in the reinforcement fibre distribution. In service conditions, the fibre-cement panels are exposed to variable atmospheric and environmental conditions, both in terms of temperature and humidity, in the form of significant temperature fluctuations, including transitions through 0 °C in a daily cycle (cyclic freeze-thaw phenomenon), the likelihood of chemical aggression in the form of acid rainfall, and exposure to ultraviolet rays [ 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. In addition, the fibre-cement cladding panels are exposed to extreme service conditions.…”

Section: Introductionmentioning

confidence: 99%

Fibre-Cement Panel Ventilated Façade Smart Control System

2021

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This paper outlines a design for a fibre-cement panel ventilated façade smart control system based on the acoustic emission method. The paper also provides methodology and test results, as well as statistical analysis of the three-point bending results with AE signal acquisition as a basis for the development of the system in question. The test items were samples cut from a full-size fibre-cement panel for interior and exterior use, according to the standard guidelines. The recorded acoustic emission signals were classified statistically into four classes, which were assigned to the processes occurring in the material structure as a result of the applied load. The system development was based on the differences between the characteristics of the individual signal classes and their number for each test case, as well as on the different distribution of successive classes over time. Given the results of the tests and the resulting conclusions indicating the applicability of the acoustic emission method (based on signal classification using the k-means algorithm for the assessment of variations in the mechanical parameters of cement-fibre composites), a methodology for such assessment was therefore developed. The approach proposed is a reasonable method for assessing the variation in mechanical parameters of fibre-cement panels on the basis of the parameters determined by the non-destructive method indicated.

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“…Due to the fact that cellulose–cement panels are currently also used in buildings classified as tall buildings and high-rise buildings, for safety reasons, it is necessary to develop a method which would facilitate the determination of the actual condition of the panels during their routine inspections. This would help to eliminate any possibility of façade siding elements falling down from the building, resulting in personal and material hazards [ 23 , 24 , 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Frequency of Acoustic Emission Events in Terms of the Assessment of the Reduction of Mechanical Parameters of Cellulose–Cement Composites

2021

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The article proposes the application of the acoustic emission method as a technique for the evaluation of mechanical parameters of cellulose–cement composites. The analysis focused on frequency values in a time series analysis of elements subject to three-point flexural stress. In the course of a statistic analysis, it has been demonstrated that a significant reduction of the recorded frequency values is associated with a considerable reduction in strength. This allowed the authors to determine the range of frequencies related to the depreciation in the strength of an element. The tests were carried out on elements cut from a full-size cellulose–cement board. Samples exposed to potential operational factors (environmental and exceptional) were analysed. It was shown that the frequencies recorded before reaching the maximum load during bending of samples exposed to environmental factors (water and low temperature) were significantly different (were much lower) from the sounds emitted by elements subjected to exceptional factors (fire and high temperature). Considering the fact that the analysed frequencies of acoustic emission events occur before the maximum stresses in the material are reached and the elements are destroyed, this provides the basis for the use of the acoustic emission method to assess the condition of cellulose–cement composites in terms of lowering mechanical parameters by observing the frequency of events generated by the material during load action. It was found that generating by material frequencies above 300 kHz during bending does not result in a significant decrease in mechanical parameters. The emission of signals with frequencies ranging from 200 to 300 kHz indicate that there was a decline in strength exceeding 25% but less than 50%. The registration of signals with frequencies below 200 kHz indicates that the reduction in mechanical parameters was greater than 50%.

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Wavelet Analysis of Acoustic Emissions during Tensile Test of Carbon Fibre Reinforced Polymer Composites

Cited by 10 publications

References 4 publications

Acoustic Emission Method for Locating and Identifying Active Destructive Processes in Operating Facilities

Acoustic Emission Method for Locating and Identifying Active Destructive Processes in Operating Facilities

Fibre-Cement Panel Ventilated Façade Smart Control System

Analysis of the Frequency of Acoustic Emission Events in Terms of the Assessment of the Reduction of Mechanical Parameters of Cellulose–Cement Composites

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