Influence of Potting Radius on the Structural Performance and Failure Mechanism of Inserts in Sandwich Structures
In this study, the mechanical performance and failure modes of cold-potted inserts within sandwich structures were examined, focusing on the influence of the potting radius, while maintaining constant insert radius and specimen characteristics. In this research, destructive testing was used to evalu...
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MDPI AG
2025-01-01
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| Online Access: | https://www.mdpi.com/2075-1702/13/1/34 |
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| author | Filippos Filippou Alexis Τ. Kermanidis |
| author_facet | Filippos Filippou Alexis Τ. Kermanidis |
| author_sort | Filippos Filippou |
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| description | In this study, the mechanical performance and failure modes of cold-potted inserts within sandwich structures were examined, focusing on the influence of the potting radius, while maintaining constant insert radius and specimen characteristics. In this research, destructive testing was used to evaluate the pull out, load-carrying capacity, and failure mechanisms of the inserts. The methods of stiffness degradation and acoustic emissions (AE) were employed for structural health monitoring to capture real-time data on failure progression, including core buckling, core rupture, and skin delamination. The results indicated that increasing the potting radius significantly altered the failure modes and critical failure load of the insert system. A critical potting radius was identified where maximum stiffness was achieved. Beyond this point, insert fracture became the dominant failure mode, with minimal damage to the surrounding core and CFRP skins. Larger potting radii also led to reduced displacement at failure, increased ultimate loads, and elevated stiffness, which were maintained until sudden structural failure. Through detailed isolation and observation of each failure event and with the use of AE data, precise identification of system damage in real time was allowed, offering insights into the progression and causes of failure. |
| format | Article |
| id | doaj-art-8193b395c78e4488a24600e325cf9448 |
| institution | Kabale University |
| issn | 2075-1702 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Machines |
| spelling | doaj-art-8193b395c78e4488a24600e325cf94482025-01-24T13:39:12ZengMDPI AGMachines2075-17022025-01-011313410.3390/machines13010034Influence of Potting Radius on the Structural Performance and Failure Mechanism of Inserts in Sandwich StructuresFilippos Filippou0Alexis Τ. Kermanidis1Laboratory of Mechanics and Strength of Materials, Department of Mechanical Engineering, University of Thessaly, 382 21 Volos, GreeceLaboratory of Mechanics and Strength of Materials, Department of Mechanical Engineering, University of Thessaly, 382 21 Volos, GreeceIn this study, the mechanical performance and failure modes of cold-potted inserts within sandwich structures were examined, focusing on the influence of the potting radius, while maintaining constant insert radius and specimen characteristics. In this research, destructive testing was used to evaluate the pull out, load-carrying capacity, and failure mechanisms of the inserts. The methods of stiffness degradation and acoustic emissions (AE) were employed for structural health monitoring to capture real-time data on failure progression, including core buckling, core rupture, and skin delamination. The results indicated that increasing the potting radius significantly altered the failure modes and critical failure load of the insert system. A critical potting radius was identified where maximum stiffness was achieved. Beyond this point, insert fracture became the dominant failure mode, with minimal damage to the surrounding core and CFRP skins. Larger potting radii also led to reduced displacement at failure, increased ultimate loads, and elevated stiffness, which were maintained until sudden structural failure. Through detailed isolation and observation of each failure event and with the use of AE data, precise identification of system damage in real time was allowed, offering insights into the progression and causes of failure.https://www.mdpi.com/2075-1702/13/1/34potting radiuscold potted insertCFRP face sheethoneycomb coreacoustic emissions |
| spellingShingle | Filippos Filippou Alexis Τ. Kermanidis Influence of Potting Radius on the Structural Performance and Failure Mechanism of Inserts in Sandwich Structures Machines potting radius cold potted insert CFRP face sheet honeycomb core acoustic emissions |
| title | Influence of Potting Radius on the Structural Performance and Failure Mechanism of Inserts in Sandwich Structures |
| title_full | Influence of Potting Radius on the Structural Performance and Failure Mechanism of Inserts in Sandwich Structures |
| title_fullStr | Influence of Potting Radius on the Structural Performance and Failure Mechanism of Inserts in Sandwich Structures |
| title_full_unstemmed | Influence of Potting Radius on the Structural Performance and Failure Mechanism of Inserts in Sandwich Structures |
| title_short | Influence of Potting Radius on the Structural Performance and Failure Mechanism of Inserts in Sandwich Structures |
| title_sort | influence of potting radius on the structural performance and failure mechanism of inserts in sandwich structures |
| topic | potting radius cold potted insert CFRP face sheet honeycomb core acoustic emissions |
| url | https://www.mdpi.com/2075-1702/13/1/34 |
| work_keys_str_mv | AT filipposfilippou influenceofpottingradiusonthestructuralperformanceandfailuremechanismofinsertsinsandwichstructures AT alexistkermanidis influenceofpottingradiusonthestructuralperformanceandfailuremechanismofinsertsinsandwichstructures |