Investigation of flexural properties and failure behaviour of biaxial braided CFRP

Hao Yuan, Rui Cai, Qingshi Meng, Lin Wang

Research output: Contribution to journalArticle

Abstract

In this research, the experimental tests of quasi-static three-point bending and three-point bending fatigue were carried out for a ±25° biaxial braided carbon fibre reinforced polymer (CFRP) manufactured using vacuum assisted resin transfer moulding (VARTM). A finite element (FE) model was also set up for quasi-static testing and the prediction results revealed that local fibre volume fraction (FVF) is a primary source affecting the mechanical properties of braided CFRP. The fatigue of the braided CFRP was defined as three different stages according to the flexural modulus results. The damage modes of the test specimens were observed via a digital microscope and scanning electron microscope (SEM) and the process-induced defects were summarised. With compiled results and observations, this study provides a better understanding of failure and fatigue behaviour of biaxial braided composites and their flexural properties which offers a good basis for any further research in fibre volume fractions, structure design and manufacturing for braided CFRP.
Original languageEnglish
Article number106545
JournalPolymer Testing
Volume87
Early online date11 Apr 2020
Publication statusPublished - Jul 2020

Keywords

  • Biaxial braided CFRP
  • Fibre volume fraction (FVF)
  • Three-point bending
  • Finite element analysis (FEA)

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