Characterization of Damages and the Residual Flexural Strength of Layered Composites After Low-Velocity Impacts Using Indicator Coatings View Full Text


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Article Info

DATE

2021-11-19

AUTHORS

O. A. Kudryavtsev, N. A. Olivenko, S. B. Sapozhnikov, A. V. Ignatova, A. V. Bezmelnitsyn

ABSTRACT

The low impact resistance is one of the main factors limiting the wide use of composites in thin-walled aircraft structures. The delaminations and intralaminar damages appearing in them after a low-velocity impact, significantly reduce their strength and, in most cases, require repairing. Indicator coatings facilitate the search for impact sites for further non-destructive testing and characterization of material defects. A reflective acrylic film and polymer composite based on hollow glass microspheres were considered as indicator coatings. They irreversibly change the reflective properties after an impact. GFRP specimens with two types of coatings were subjected to low-velocity impact tests, followed by a residual bending strength assessment. Tests results showed that the indentation diameter on the coating noticeably depend on the impact energy and could indirectly characterize barely visible impact damages and the residual strength of the material. Besides, the coating based on hollow glass microspheres acts as a protective layer and increases the damage tolerance of composites. More... »

PAGES

587-596

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11029-021-09981-y

DOI

http://dx.doi.org/10.1007/s11029-021-09981-y

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1142686448


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