Impact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode II fracture
Abstract This work analyses how environmental degradation affects the behaviour of adhesive joints in carbon-epoxy composites. These joints, made from a unidirectional carbon fibre-reinforced epoxy matrix and bonded with an epoxy-based adhesive, were tested under mode II fracture static and fatigue...
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-12231-z |
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| author | Paula Vigón Jaime Viña Miguel Lozano Antonio Argüelles |
| author_facet | Paula Vigón Jaime Viña Miguel Lozano Antonio Argüelles |
| author_sort | Paula Vigón |
| collection | DOAJ |
| description | Abstract This work analyses how environmental degradation affects the behaviour of adhesive joints in carbon-epoxy composites. These joints, made from a unidirectional carbon fibre-reinforced epoxy matrix and bonded with an epoxy-based adhesive, were tested under mode II fracture static and fatigue loading conditions. The experimental analysis was carried out using the End Notched Flexure (ENF) test method to evaluate both the fatigue initiation phase (G-N curves) and the fatigue crack growth phase (G-da/dN curves). Specimens were subjected to controlled exposure in a salt spray chamber and a climatic chamber (hygrothermal) with different exposure periods: no exposure, 1 week, 2 weeks, 4 weeks and 12 weeks. Fatigue initiation data were analysed using a probabilistic Weibull distribution model. Key findings reveal that environmental degradation significantly reduces the fatigue resistance of the adhesive joints. Under static loading, the load capacity of the adhesive joints decreased by approximately 20% after saline exposure and 25% after hygrothermal exposure. Additionally, fatigue crack growth rates were found to change depending on the type and duration of environmental exposure, underscoring the critical role of environmental conditions on joint behaviour. |
| format | Article |
| id | doaj-art-421b32335a6b4093ab4682a8fcd343eb |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-421b32335a6b4093ab4682a8fcd343eb2025-08-20T04:03:01ZengNature PortfolioScientific Reports2045-23222025-07-0115111510.1038/s41598-025-12231-zImpact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode II fracturePaula Vigón0Jaime Viña1Miguel Lozano2Antonio Argüelles3Department of Construction and Manufacturing Engineering, University of OviedoDepartment of Materials Science and Metallurgical Engineering, University of OviedoDepartment of Construction and Manufacturing Engineering, University of OviedoDepartment of Construction and Manufacturing Engineering, University of OviedoAbstract This work analyses how environmental degradation affects the behaviour of adhesive joints in carbon-epoxy composites. These joints, made from a unidirectional carbon fibre-reinforced epoxy matrix and bonded with an epoxy-based adhesive, were tested under mode II fracture static and fatigue loading conditions. The experimental analysis was carried out using the End Notched Flexure (ENF) test method to evaluate both the fatigue initiation phase (G-N curves) and the fatigue crack growth phase (G-da/dN curves). Specimens were subjected to controlled exposure in a salt spray chamber and a climatic chamber (hygrothermal) with different exposure periods: no exposure, 1 week, 2 weeks, 4 weeks and 12 weeks. Fatigue initiation data were analysed using a probabilistic Weibull distribution model. Key findings reveal that environmental degradation significantly reduces the fatigue resistance of the adhesive joints. Under static loading, the load capacity of the adhesive joints decreased by approximately 20% after saline exposure and 25% after hygrothermal exposure. Additionally, fatigue crack growth rates were found to change depending on the type and duration of environmental exposure, underscoring the critical role of environmental conditions on joint behaviour.https://doi.org/10.1038/s41598-025-12231-zCompositesDelaminationAdhesiveFractureFatigueMode II |
| spellingShingle | Paula Vigón Jaime Viña Miguel Lozano Antonio Argüelles Impact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode II fracture Scientific Reports Composites Delamination Adhesive Fracture Fatigue Mode II |
| title | Impact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode II fracture |
| title_full | Impact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode II fracture |
| title_fullStr | Impact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode II fracture |
| title_full_unstemmed | Impact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode II fracture |
| title_short | Impact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode II fracture |
| title_sort | impact of adverse environmental conditions on the fatigue behavior of carbon epoxy adhesive joints under mode ii fracture |
| topic | Composites Delamination Adhesive Fracture Fatigue Mode II |
| url | https://doi.org/10.1038/s41598-025-12231-z |
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