Modeling the acoustic emissions generated during dynamic fracture under bending

Gemmeren, Valentin van; Graf, T.; Dual, Jürg

doi:10.1016/j.ijsolstr.2020.07.012

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Theoretical studies, however, do not delve into the processes of AE signal formation. When the destruction of CM elements occurs, numerical modeling using the finite element method is employed to simulate stress changes (stress waves) that cause surface displacements resulting in AE waves [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission during Non-Uniform Progression of Processes in Composite Failure According to the Von Mises Criterion

Filonenko,

Stakhova,

Bekö

et al. 2024

J. Compos. Sci.

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In the study, based on the model of acoustic emission during the destruction of a composite material by shear force according to the Von Mises criterion, the effect of non-uniformity of the destruction process on the generated acoustic emission signal is simulated. The study under the accepted modeling conditions allows us to determine the patterns of changes in the amplitude envelope of acoustic emission signals at various stages of developing processes. In theoretical and experimental studies of acoustic emission signals when searching for patterns in their parameter changes and developing methods for monitoring or diagnosing the state of composite materials, the problem lies in the interpretation of recorded information. This issue arises from the complexity and diversity of processes occurring in the material structure at micro and macro levels, and the high sensitivity of the acoustic emission method to these processes, wherein structural changes lead to observable alterations in the characteristics of acoustic emissions. Solving this problem requires both theoretical and experimental studies to understand the influence of various factors on the characteristics of the generated acoustic emission. The results of the presented study can be used to assess the condition of composite materials and structures, such as bridges, e.g., in terms of defectiveness, property dispersion, damage during operation, and other characteristics.

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Section: Introductionmentioning

confidence: 99%

Acoustic Emission during Non-Uniform Progression of Processes in Composite Failure According to the Von Mises Criterion

Filonenko,

Stakhova,

Bekö

et al. 2024

J. Compos. Sci.

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“…Suzuki et al [39] extended the analyses to a dissipative medium including a relaxation function. Giordano et al [42] developed a model for AE wave propagation based on the ray theory, applied in plates with viscoelastic properties. Numerical methods were then used to simulate the sources of AE.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission Signal Due to Fiber Break and Fiber Matrix Debonding in Model Composite: A Computational Study

et al. 2021

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Acoustic emission monitoring is a useful technique to deal with detection and identification of damage in composite materials. Over the last few years, identification of damage through intelligent signal processing was particularly emphasized. Data-driven models are developed to predict the remaining useful lifetime. Finite elements modeling (FEM) was used to simulate AE signals due to fiber break and fiber/matrix debonding in a model carbon fiber composite and thereby better understand the AE signals and physical phenomena. This paper presents a computational analysis of AE waveforms resulting from fiber break and fiber/matrix debonding. The objective of this research was to compare the AE signals from a validated fiber break simulation to the AE signals obtained from fiber/matrix debonding and fiber break obtained in several media and to discuss the capability to detect and identify each source.

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Measurement and Simulation of the Propagation of Impulsive Acoustic Emission Sources in Pipes

Abolle-Okoyeagu,

Fatukasi,

Reuben

2024

Acoustics

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Acoustic Emission (AE) testing is a non-destructive evaluation technique that has gained significant attention in pipeline monitoring. Pencil-lead breaks (PLBs) are commonly used in reproducing and characterising sensors used in AE applications and have emerged as a valuable tool for calibration processes. This technique involves breaking a pencil lead by pressing it on the surface of the test structure and applying a bending moment at a given angle on a surface. The applied force produces a local deformation on the test surface, which is released when the lead breaks. The fracture in these PLBs is assumed to be a step unload; however, this is not the case. In this work, a series of PLB source experiments complemented with parallel numerical simulations were carried out to investigate the actual unload rate by correlating the relationship between AE speed, frequency, and power from PLBs. This was achieved by varying the simulation unload rates recorded over a duration of 2 s on a steel pipe and comparing to the experiment. Analysis of the investigated results from the experimental and numerical models suggests that although the AE line structure of a PLB can be reproduced by simulation for short times only (1 µs), the actual unload rate for PLBs is in the region of 10–8 s. It is concluded that FEA has the potential to help in the recovery of the temporal structure from real AE structures. The establishment of this model will provide a theoretical basis for future studies on the monitoring of non-impulsive AE sources such as impact on pipelines using finite element analysis.

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Modeling the acoustic emissions generated during dynamic fracture under bending

Cited by 3 publications

References 35 publications

Acoustic Emission during Non-Uniform Progression of Processes in Composite Failure According to the Von Mises Criterion

Acoustic Emission during Non-Uniform Progression of Processes in Composite Failure According to the Von Mises Criterion

Acoustic Emission Signal Due to Fiber Break and Fiber Matrix Debonding in Model Composite: A Computational Study

Measurement and Simulation of the Propagation of Impulsive Acoustic Emission Sources in Pipes

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