The influence of technological defects on the mechanical behavior of CFRP during buckling under compression based on DIC data and acoustic emission
DOI:
https://doi.org/10.3221/IGF-ESIS.69.05Keywords:
Carbon-fibre composite, Buckling, Dry-spot, Wrinkles, Mechanical behavior, Compression, Acoustic emission, Digital image correlationAbstract
The research focuses on examining the impact of technological defects, specifically "dry-spot" and "wrinkles," on the mechanical behavior and buckling resistance of structural composites. The investigation of the buckling phenomenon was carried out through a compression test on a thin plate fabricated from carbon-fiber-reinforced polymer (CFRP) laminate. This test was performed using a specialized fixture designed in accordance with ASTM 3410 standard. For the analysis, the study employed a three-dimensional digital optical system, Vic-3D, in conjunction with the AMSY-6 acoustic emission system.
The research showcases findings from acoustic emission signals that verify the shear-based mechanism of buckling in plates constructed from CFRP featuring "dry-spot" type defects. In the case of "wrinkles" defects, it was observed that transverse shear transpires at the stress concentration points created by the "excess" layers.
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Copyright (c) 2024 Stanislav Slovikov, Dmitry Lobanov , Ekaterina Chebotareva, Valeria Melnikova
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