EFFECT OF HUMIDITY AND TEMPERATURE ON THE STRENGTH OF REPAIRED WOVEN FABRIC COMPOSITES

Date

2025-01-01

Author

Sonat, Evren
BAKIR, METE
Özerinç, Sezer

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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The durability of repaired CFRP components under environmental conditions such as high humidity and temperature is critical for reliable long-term operation. This study investigates the effects of temperature and moisture on the repair strength of prepreg and wet lay-up repairs performed on M21/AS4C carbon/epoxy fabric panels. A series of wet lay-up and prepreg step-repaired specimens produced according to standardized aerospace procedures were tested under uniaxial tension. For each case, dry specimens and hot-wet specimens immersed in water at 70°C for 14 days were considered. The experimental measurements on 3.8° scarf angle repairs showed that the strength recovery could be as high as 68% for the prepreg repairs and 59% for the wet lay-up repairs for unconditioned specimens. The moisture and humidity exposure did not have a significant impact on the strength of the prepreg-based repairs. Wet lay-up repaired specimens, on the other hand, showed a 30% reduction in strength upon exposure to humidity and temperature. The results show that prepreg repairs should be preferred over wet lay-up repairs for the long-term reliable operation of repaired components.

Subject Keywords

carbon-fiber reinforced polymers, mechanical behavior, repair

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105009689494&origin=inward
https://hdl.handle.net/11511/115240

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Department of Mechanical Engineering, Conference / Seminar