Journal
CHINESE JOURNAL OF AERONAUTICS
Volume 31, Issue 6, Pages 1273-1286Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2018.03.021
Keywords
Energy absorption; Fabrics; Gas turbines; Impact resistance; Multi-layers; Pre-tension
Categories
Funding
- National Natural Science Foundation of China [51575262]
- China Postdoctoral Science Foundation [2015M571754]
- Aeronautical Science Foundation of China [2015ZB52008]
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In this paper, ballistic impact tests on wrapped multi-layer Kevlar 49 woven fabric systems were carried out with a flat blade projectile to investigate the impact response during a fan blade out event. The influences of the number of Kevlar layers and pre-tension were discussed particularly. Test results were used to analyze failure modes and energy absorption characteristics of multi-ply Kevlar fabrics. Results show that there are two kinds of impact damage for fabrics: global deformation mainly involving stretching of yarns in the impact region and fabric wrinkle from both sides to the impact zone, and local damage characterized by yarn fracture, yarn pull-out, and yarn unraveling. The energy absorption capability of Kevlar 49 woven fabrics improves with the number of fabric layers. The energy absorbed by multi-layer fabrics increases slightly at the beginning and then decreases substantially with pre-tension. The work in this paper can provide guidance for designing light-weight multi-layer fabrics containment systems. (C) 2018 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.
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