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- W1896467627 abstract "A recent development of carbon nanotubes (CNTs) based structural composite materials is to grow CNTs radially on micro-fibres and to use these hybrid fibres to develop superior 3D composites. Due to the extremely high tensile strength and stiffness of CNTs and the increased interfacial areas, it is expected that the fracture toughness of the new composites will be increased substantially. To evaluate the bridging effect of this new hybrid fibre, a finite element model was developed to simulate the pullout of a carbon fibre with radially grown carbon nanotubes. The physical multi-length scale problem is treated at the single macroscopic scale by using equivalent spring elements to simulate the bridging effect from CNTs. The nonlinear properties of the spring elements are obtained from the finite element simulation of a single CNT pullout, where the CNT is simulated by using membrane elements. The bonding and debonding behaviours between the carbon fibre-matrix interface and CNT-matrix interface are described by cohesive laws. The cohesive law for the carbon fibre-matrix interface was calibrated from macroscopic single fibre pullout experimental curves. The cohesive law for the CNT-matrix interface was calibrated from published experimental data on single CNT pullout. The numerical results indicate that the effect of growth CNTs on the carbon fibre is significant. The pullout force of the hybrid fibre has a significant increase at the elastic stage before interfacial debonding, which leads to a higher specific pullout energy." @default.
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- W1896467627 date "2013-10-22" @default.
- W1896467627 modified "2023-09-25" @default.
- W1896467627 title "A Numerical Model to Simulate the Pullout of Carbon Fibre with Radially Grown Carbon Nanotubes" @default.
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