Numerical-experimental study on the compressive behaviour of repaired composite panels

Riccio, Aniello; Sellitto, Andrea; Garofano, Antonio; Ingenito, Giancarlo; Zarrelli, Mauro

doi:10.1016/j.compositesb.2022.110466

Cited by 7 publications

(1 citation statement)

References 24 publications

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“…Regarding repair strategies, there is still an ongoing need to understand the recovery of structural performance. Riccio et al recently reported that the stacking sequence of the repair patch plays the main role in the effectiveness of recovering the mechanical performance and overall behaviour of the component [6]. Overall, bonded flush repairs, i.e.…”

Section: Introductionmentioning

confidence: 99%

Handling, inspection and repair of aircraft composites: a pilot study on the awareness of maintenance personnel

et al. 2023

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Composite materials are enjoying an increasing use in aircraft structures. As more fleets transition from metal to more composite aircraft, the practice of maintenance is also adjusting. Handling, inspection and repair of aircraft composites following non-visible or barely visible damage are among the areas of concern, due to associated cost and safety implications. A pilot study was performed to explore the level of awareness and understanding of aviation maintenance practitioners around these issues. In addition, this research project sought to identify factors related to the technical/engineering judgement capacity of the personnel working with composites and to gauge the need for specialised education and training. A questionnaire survey was administered to a group of 40 professionals working for an aircraft maintenance, repair and overhaul (MRO) organisation. Descriptive statistics in conjunction with analysis of variance (ANOVA) were used to analyse the results. The sources of impact and common areas affected on the aircraft have been identified, with situational awareness suggested as the most important mitigator against impact damage. Over 70% of the participants would refer to their engineering manager for instructions on how to handle composite damage. The need for higher standardisation for composites’ maintenance, repair and handling issues emerged as a common theme across different sections of the survey. Almost all respondents agree on the need for specialised knowledge and training for the handling, repair and inspection of composites.

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Section: Introductionmentioning

confidence: 99%

Handling, inspection and repair of aircraft composites: a pilot study on the awareness of maintenance personnel

et al. 2023

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Repairing of recycled hybrid carbon fiber laminates

Proietti,

Quadrini,

Santo

2024

Polymer Composites

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Compression molded hybrid laminates have been manufactured by stacking 10 recycled epoxy‐based carbon fiber plies with interlaminar polyamide film of 50 μm thickness. At first, carbon fiber (CF) reinforced composites underwent thermo‐mechanical disassembly to obtain single composite CF plies. These plies, still impregnated with the waste cured resin, have been re‐assembled by interposing one or two sheets of the thermoplastic film in the lamination sequence. Neat laminates have been used for comparison. Samples of size 85 × 30 mm2 have been tested under bending load, and materials repairability has been evaluated under 2 consecutive repairing cycles that have been carried out by applying pressure and heat along the composite failure line. Even though the neat composite showed the best mechanical properties, after the first repairing cycle a drastic drop has been recorded with a reduction of the elastic modulus of 92.4%. On the other hand, the elastic modulus of the hybrid composites has been reduced of only 24% on average.Highlights Thermo‐mechanical disassembly is used to recycle epoxy carbon fiber composite. Hybrid laminates are obtained by placing polyamide film between recycled plies. Pressure and heat are applied along the composite failure line for repairing. Hybrid composites repairing is carried out in comparison with neat materials. Repaired hybrid laminates have a higher elastic modulus than neat once.

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On the effectiveness of double-double design on crashworthiness of fuselage barrel

Garofano

Sellitto

Acanfora

et al. 2023

Aerospace Science and Technology

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Numerical-experimental study on the compressive behaviour of repaired composite panels

Cited by 7 publications

References 24 publications

Handling, inspection and repair of aircraft composites: a pilot study on the awareness of maintenance personnel

Handling, inspection and repair of aircraft composites: a pilot study on the awareness of maintenance personnel

Repairing of recycled hybrid carbon fiber laminates

On the effectiveness of double-double design on crashworthiness of fuselage barrel

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