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

Mahmoud R. Abusrea, Seung Wook Han, Kazuo Arakawa, Nak Sam Choi

Research output: Contribution to journalArticle

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.

LanguageEnglish
Pages8-16
Number of pages9
JournalComposites Part B: Engineering
Volume156
DOIs
Publication statusPublished - Jan 1 2019

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Adhesive joints
Resin transfer molding
Carbon fiber reinforced plastics
Bending strength
Carbon fibers
Vacuum
Acoustic emissions
Plastic laminates
Bending tests
Fiber reinforced materials
carbon fiber
carbon fiber reinforced plastic
Fibers
Sensors

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Bending strength of CFRP laminated adhesive joints fabricated by vacuum-assisted resin transfer molding. / Abusrea, Mahmoud R.; Han, Seung Wook; Arakawa, Kazuo; Choi, Nak Sam.

In: Composites Part B: Engineering, Vol. 156, 01.01.2019, p. 8-16.

Research output: Contribution to journalArticle

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