Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 232, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2022.109864
Keywords
Laminate; Carbon fibres; Fatigue; Damage tolerance; Optical microscopy
Categories
Ask authors/readers for more resources
The use of composites in aircraft structures requires a slow growth criteria and an appropriate similitude parameter to assess their life. This study examines the interconnected damage growth mechanisms in different layups and explores the efficacy of proposed similitude parameters in capturing slow crack growth. The results demonstrate the need to analyze similitude parameters across various sample geometries and stress states to understand composite material fatigue performance in aerospace applications.
The growing use of composites in aircraft structures has necessitated a slow growth criteria to assess the life of these materials and an appropriate similitude parameter. Due to the simplified stress state and inherent in-teractions of intralaminar and interlaminar damage progression in multi-directional ply layups, there have been questions about the applicability of double cantilever beam specimens to aerospace applications. This study examines these interconnected damage growth mechanisms in [+/- 453]s and [+/- 452/902]s layups via compact tension specimen geometries, with and without pre-existing damage, in order to examine the efficacy of proposed similitude parameters in capturing slow crack growth. The change in stored potential strain energy per cycle provided the most unified results across the 18 tests under different loading and pre-existing damage conditions. Via microscopy of the specimens after damage progression, the similitude parameters were connected to overall trends in the damage mechanisms. The fatigue results, coupled with the microscopy of the interactions amongst the complex damage mechanisms, demonstrates the need to analyze proposed similitude parameters across various sample geometries and stress states, which will be more enable an understanding of composite material fatigue performance in aerospace applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available