Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation Tests
Carbon fiber-reinforced polymers (CFRP) are widely used composite materials in structural applications, where their mechanical performance is significantly influenced by interfacial shear strength (IFSS). The single fiber fragmentation test (SFFT) is a common technique for characterizing IFSS, but i...
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MDPI AG
2025-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/15/8/4517 |
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| author | Felipe Romero Franco Méndez Javiera González Víctor Tuninetti Carlos Medina Meylí Valin José Valin Alexis Salas Cristián Vicuña |
| author_facet | Felipe Romero Franco Méndez Javiera González Víctor Tuninetti Carlos Medina Meylí Valin José Valin Alexis Salas Cristián Vicuña |
| author_sort | Felipe Romero |
| collection | DOAJ |
| description | Carbon fiber-reinforced polymers (CFRP) are widely used composite materials in structural applications, where their mechanical performance is significantly influenced by interfacial shear strength (IFSS). The single fiber fragmentation test (SFFT) is a common technique for characterizing IFSS, but its reliance on optical microscopy makes it time-consuming and impractical for opaque matrices. This study presents an alternative methodology based on acoustic emission (AE) analysis, enabling the estimation of fragment lengths through statistical modeling. The AE technique captures the energy released during fiber fragmentation, represented as AE bursts, whose accurate detection is crucial. A signal-processing approach based on progressive simplification enhances burst detection. To refine the estimation of fragment lengths, a gamma distribution is fitted to experimental data, accounting for observed asymmetry in optical measurements. Results indicate that this approach achieves an IFSS determination error of 14.16% at a 95% confidence level. This study demonstrates the feasibility of using AE for IFSS characterization in SFFT and contributes to future research on AE applications in composite materials. |
| format | Article |
| id | doaj-art-6d23afa89c964bc0abf31ca03fd3e62c |
| institution | OA Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-6d23afa89c964bc0abf31ca03fd3e62c2025-08-20T02:28:40ZengMDPI AGApplied Sciences2076-34172025-04-01158451710.3390/app15084517Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation TestsFelipe Romero0Franco Méndez1Javiera González2Víctor Tuninetti3Carlos Medina4Meylí Valin5José Valin6Alexis Salas7Cristián Vicuña8Departamento de Ingeniería Mecánica (DIM), Facultad de Ingeniería (FI), Universidad de Concepción, Concepción 4070409, ChileDepartamento de Ingeniería Mecánica (DIM), Facultad de Ingeniería (FI), Universidad de Concepción, Concepción 4070409, ChileInstituto de Geología Económica Aplicada, Universidad de Concepción, P.O. Box 160-C, Concepción 4070386, ChileDepartment of Mechanical Engineering, Universidad de La Frontera, Temuco 4811230, ChileDepartamento de Ingeniería Mecánica (DIM), Facultad de Ingeniería (FI), Universidad de Concepción, Concepción 4070409, ChileDepartamento de Ingeniería Mecánica (DIM), Facultad de Ingeniería (FI), Universidad de Concepción, Concepción 4070409, ChileEscuela de Ingeniería Mecánica, Pontificia Universidad Católica de Valparaíso, Valparaíso 2340025, ChileDepartamento de Ingeniería Mecánica (DIM), Facultad de Ingeniería (FI), Universidad de Concepción, Concepción 4070409, ChileDepartamento de Ingeniería Mecánica (DIM), Facultad de Ingeniería (FI), Universidad de Concepción, Concepción 4070409, ChileCarbon fiber-reinforced polymers (CFRP) are widely used composite materials in structural applications, where their mechanical performance is significantly influenced by interfacial shear strength (IFSS). The single fiber fragmentation test (SFFT) is a common technique for characterizing IFSS, but its reliance on optical microscopy makes it time-consuming and impractical for opaque matrices. This study presents an alternative methodology based on acoustic emission (AE) analysis, enabling the estimation of fragment lengths through statistical modeling. The AE technique captures the energy released during fiber fragmentation, represented as AE bursts, whose accurate detection is crucial. A signal-processing approach based on progressive simplification enhances burst detection. To refine the estimation of fragment lengths, a gamma distribution is fitted to experimental data, accounting for observed asymmetry in optical measurements. Results indicate that this approach achieves an IFSS determination error of 14.16% at a 95% confidence level. This study demonstrates the feasibility of using AE for IFSS characterization in SFFT and contributes to future research on AE applications in composite materials.https://www.mdpi.com/2076-3417/15/8/4517carbon fiberinterface characterizationsingle fiber fragmentation testacoustic emissionsburst detection |
| spellingShingle | Felipe Romero Franco Méndez Javiera González Víctor Tuninetti Carlos Medina Meylí Valin José Valin Alexis Salas Cristián Vicuña Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation Tests Applied Sciences carbon fiber interface characterization single fiber fragmentation test acoustic emissions burst detection |
| title | Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation Tests |
| title_full | Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation Tests |
| title_fullStr | Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation Tests |
| title_full_unstemmed | Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation Tests |
| title_short | Acoustic Emission-Based Method for IFSS Characterization in Single-Fiber Fragmentation Tests |
| title_sort | acoustic emission based method for ifss characterization in single fiber fragmentation tests |
| topic | carbon fiber interface characterization single fiber fragmentation test acoustic emissions burst detection |
| url | https://www.mdpi.com/2076-3417/15/8/4517 |
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