Reference : Strain and Damage Self-Sensing of BFRP Laminates Fabricated with CNFs/Epoxy Composite...
Scientific journals : Article
Engineering, computing & technology : Civil engineering
Strain and Damage Self-Sensing of BFRP Laminates Fabricated with CNFs/Epoxy Composites under Tension
Wang, Y.L []
Wang, Y.S. []
Wan, B.L. []
Han, B.G. []
Cai, Gaochuang mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Chang, R.J. []
Composites. Part A, Applied Science and Manufacturing
United Kingdom
[en] This study investigated the strain and damage self-sensing capabilities of basalt fiber reinforced polymer (BFRP) laminates fabricated with carbon nanofibers (CNFs)/epoxy composites subjected to tensile loadings. The conduction mechanisms based on the tunnel conduction and percolation conduction theories as well as the damage evolution were also explored. A compensation circuit with a half-bridge configuration was proposed. The results indicated the resistivity of the CNFs/BFRP laminates and CNFs/epoxy composites exhibited similar change rule, indicating that the conductive networks of CNFs/BFRP laminates were governed by CNFs/epoxy composites. With the increase of strain under monotonic tensile loading, the electrical resistance response could be classified into three stages corresponding to different damage modes. This confirmed CNFs/BFRP laminates have excellent self-sensing abilities to monitor their internal damages. Moreover, stable and repeatable strain self-sensing capacity of the CNFs/BFRP laminates was verified under cyclic tensile loading because the electrical resistance varied synchronously with the applied strain.

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