Title
A proposal for similitude in characterizing fatigue delamination behavior with fibre bridging of carbon-fibre reinforced polymer composites
Author
Yao, Liaojun (Harbin Institute of Technology; Aircraft Strength Research Institute)
Chuai, Mingyue (Harbin Institute of Technology)
Lyu, Zhangming (Harbin Institute of Technology)
Chen, Xiangming (Aircraft Strength Research Institute)
Guo, Licheng (Harbin Institute of Technology)
Alderliesten, R.C. (TU Delft Structural Integrity & Composites) 
Date
2024
Abstract
Methods based on fracture mechanics have been widely used in fatigue delamination growth (FDG) characterization of composite laminates. These methods are based on the similitude hypothesis. It is therefore important to have appropriate parameters to well represent the similitude, which is useful for fatigue delamination test standard development aimed by Technical Committee 4 of the European Structural Integrity Society (ESIS TC4) and the ISO/TC61/SC13. In the present study, discussions on similitude parameters for fibre-bridged fatigue delamination interpretation have been conducted via fatigue data with fibre bridging at different R-ratios. The results clearly demonstrate that the strain energy release rate (SERR) indeed applied around the crack front, rather than the total applied SERR, should be employed to represent the similitude for FDG interpretation with large-scale fibre bridging. Particularly, the use of Δ√Gtip can well determine fibre-bridged delamination behavior of a given R-ratio, but it is not valid for FDG at different R-ratios in accordance with the similitude principles. A new similitude parameter, in terms of both Δ√Gtip and the maximum SERR Gmax_tip, was therefore proposed to appropriately represent FDG behavior with fibre bridging at different R-ratios. This study can not only provide database, but also give important insights for the development of mode I fatigue delamination test standard of composite laminates.
Subject
Composite laminates
Fatigue delamination
Fibre bridging
Similitude
Stress ratio
To reference this document use:
http://resolver.tudelft.nl/uuid:0effe8fb-f5c3-4aeb-b4cf-baf7bfad2ec2
DOI
https://doi.org/10.1016/j.engfracmech.2023.109756
Embargo date
2024-06-03
ISSN
0013-7944
Source
Engineering Fracture Mechanics, 295
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Liaojun Yao, Mingyue Chuai, Zhangming Lyu, Xiangming Chen, Licheng Guo, R.C. Alderliesten