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Bending strength of CFRP laminated adhesive joints fabricated by vacuum-assisted resin transfer molding

Title
Bending strength of CFRP laminated adhesive joints fabricated by vacuum-assisted resin transfer molding
Author
최낙삼
Keywords
CFRP joints; Vacuum-assisted resin transfer molding; Bending strength; Joint efficiency; Acoustic emission
Issue Date
2019-01
Publisher
ELSEVIER SCI LTD
Citation
COMPOSITES PART B-ENGINEERING, v. 156, Page. 8-16
Abstract
The laminated joints used in this work were adhesive joints constructed using two dry carbon fiber halves. Some improvements were introduced to the joints to enhance their bending strength performance: stitching of the two halves together by fiber bundles and inserting extra carbon fiber covers in the joint connection. We studied three adhesive joints: a conventional basic and two improved laminated joints. All joint specimens were fabricated using a vacuum-assisted resin transfer molding (VARTM) process. The joints were evaluated with a bending test, and were compared to the bending strength of a jointless carbon fiber reinforced plastic (CFRP) laminate. Two acoustic emission (AE) sensors were placed on the specimen to monitor the fracture progresses during the test. The improved laminated joints, stitched and multiple-cover overlapped joints, showed enhanced bending strength and joint efficiency. The improvement depended significantly on the number of carbon fiber layers. The maximum increase was 24% for the stitched laminated joint of 5 layers and 58% for the multiple-overlapped joint of 6 layers, respectively. Such high joint efficiency was due to the effect of the carbon fiber reinforcement on the joints, by which many carbon fibers supported the strength in advance of reaching the maximum load point, as confirmed by AE measurement analysis.
URI
https://www.sciencedirect.com/science/article/pii/S1359836818309417https://repository.hanyang.ac.kr/handle/20.500.11754/112179
ISSN
1359-8368; 1879-1069
DOI
10.1016/j.compositesb.2018.08.041
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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