An experimental investigation into multi-functional Z-pinned composite laminates

Zhang, Bing; Hallett, Stephen R.

doi:10.1016/j.matdes.2016.07.035

Cited by 30 publications

(15 citation statements)

References 36 publications

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“…Hence, it is very necessary to enhance the interlaminar mechanical properties of laminates to reduce lightning damage. Many techniques have been developed to improve the interlaminar fracture toughness of laminates, such as resin matrix modification, [20] through-thickness stitching, [21] Z-pinning, [22] and interleaving. [23] Among them, interleaving is one of the most effective methods to enhance interlaminar properties.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional nickel‐coated carbon fiber veil for improving both fracture toughness and electrical performance of carbon fiber/epoxy composite laminates

et al. 2021

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The poor lightning strike resistance limits the application of carbon fiberreinforced polymer (CFRP) composites in aircraft. Multifunctional fiber composites can reduce lightning strike damage by improving interlaminar mechanical properties and electrical conductivity. In this study, nickel-coated carbon fiber (NiCF) veil was explored as a functional interleaf of CFRP composites to simultaneously improve the interlaminar fracture toughness (G IC by 74.75% and G IIC by 36.22%) and through-thickness electrical conductivity (by 220.49%). The toughening mechanisms of NiCF veils mainly include the pull-out, debonding, and breakage of NiCFs, as well as peeling and splitting of nickel coating. The improvement of conductivity is mainly attributed to the increase of conductive paths. Furthermore, the NiCF veil-interleaved laminates still maintained relatively high-electrical conductivity after delamination, which was formulated as a structure-function relationship expression. The interesting finding is beneficial to lightning protection, especially for damaged composites. The NiCF veil is a potential interleaf for structure-function integration of composites, and has the potential to suppress lightning damage to aerostructures.

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Section: Introductionmentioning

confidence: 99%

Multifunctional nickel‐coated carbon fiber veil for improving both fracture toughness and electrical performance of carbon fiber/epoxy composite laminates

et al. 2021

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“…More recently, there has been a strongly growing interest towards the exploration of multi-functionality in composites, in addition to load bearing functions. A number of studies have been published regarding the multi-functionality of Z-pinned composites [12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al [12] characterised the Mode I & Mode II delamination self-sensing function of Z-pinned laminates by measuring the real-time through-thickness electrical resistance for both conductive and non-conductive fibre-reinforced plastics. They later extended the delamination monitoring method to composites reinforced by conductive Z-pin arrays and proposed a structural-level design strategy for multifunctional Z-pinned composites [13]. The latter is based on connecting Z-pins both in series and in parallel via arrays of electrodes attached to the laminate surface.…”

Section: Introductionmentioning

confidence: 99%

Effects of ferromagnetic & carbon-fibre Z-Pins on the magnetic properties of composites

Chen

Zhang

Friedemann

2021

Composites Science and Technology

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“…In recent years, great progress has been made in the research on the mechanical behavior of Z-pins reinforced composites [7][8][9][10][11]. The research on the failure mechanism and strength of Z-pins reinforced composite joints started relatively late, and there is relative few research on the progressive damage propagation behavior of Z-pins.…”

Section: Introductionmentioning

confidence: 99%

Damage Failure Analysis of Z-Pins Reinforced Composite Adhesively Bonded Single-Lap Joint

Yang¹,

Gong²,

Xia³

et al. 2021

Computer Modeling in Engineering &Amp; Sciences

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In order to study the mechanical properties of Z-pins reinforced laminated composite single-lap adhesively bonded joint under un-directional static tensile load, damage failure analysis of the joint was carried out by means of test and numerical simulation. The failure mode and mechanism of the joint were analyzed by tensile failure experiments. According to the experimental results, the joint exhibits mixed failure, and the ultimate failure is Z-pins pulling out of the adherend. In order to study the failure mechanism of the joint, the finite element method is used to predict the failure strength. The numerical results are in good agreement with the experimental results, and the error is 6.0%, which proves the validity of the numerical model. Through progressive damage failure analysis, it is found that matrix tensile failure of laminate at the edge of Z-pins occurs first, then adhesive layer failure-proceeds at the edge of Z-pins, and finally matrix-fiber shear failure of the laminate takes place. With the increase of load, the matrix-fiber shear failure expands gradually in the X direction, and at the same time, the matrix tensile failure at the hole edge gradually extends in different directions, which is consistent with the experimental results. KEYWORDSZ-pins reinforced composite adhesively bonded single-lap joints; failure mode; uniaxial tensile test; strength prediction; progressive damage

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An experimental investigation into multi-functional Z-pinned composite laminates

Cited by 30 publications

References 36 publications

Multifunctional nickel‐coated carbon fiber veil for improving both fracture toughness and electrical performance of carbon fiber/epoxy composite laminates

Multifunctional nickel‐coated carbon fiber veil for improving both fracture toughness and electrical performance of carbon fiber/epoxy composite laminates

Effects of ferromagnetic & carbon-fibre Z-Pins on the magnetic properties of composites

Damage Failure Analysis of Z-Pins Reinforced Composite Adhesively Bonded Single-Lap Joint

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