The Experts below are selected from a list of 29457 Experts worldwide ranked by ideXlab platform

Ian P Bond - One of the best experts on this subject based on the ideXlab platform.

  • metal triflates as catalytic curing agents in self healing fibre reinforced Polymer Composite materials
    Macromolecular Materials and Engineering, 2014
    Co-Authors: T S Coope, R S Trask, Duncan F Wass, Ian P Bond
    Abstract:

    High performance, damage tolerant fibre reinforced Polymer (FRP) Composite materials are currently required to demonstrate no propagation of any sub-surface structural micro-cracking when under service load, thereby encouraging overdesign and limiting the inherent lightweight nature of such a material. By incorporating selfhealing functionalities, in-situ autonomous repair can be initiated in the event of damage to maintain structural integrity while ultimately realising lighter and more sustainable structures. We have demonstrated metal triflate initiated ring opening Polymerisation (ROP) of epoxide resin [1] in FRPs to restore >99% of the host matrix fracture toughness after damage under Mode I tests. Optimising the Polymer composition via differential scanning calorimetry (DSC) identified the key parameters to achieve autonomous curing under ambient conditions. Initial and self-healed performance was evaluated using FRP E-glass double cantilever beam (DCB) coupon mechanical test specimens with embedded microvascular channels for self-healing agent delivery. Full recovery of fracture toughness (>99%) was demonstrated while achieving the following requirements: low cost, low toxicity, autonomous curing, autonomous delivery, usability, manufacturing processability and applicability to existing aerospace and automotive maintenance programs. Brittle and ductile cohesive failure mechanisms resulted from inclusion of a solvent (ethyl phenylacetate) within the healing agent under low (10 wt%) and medium (25 wt%) concentrations. Therefore, the failure mechanism can be adapted as the solvent acts as a plasticiser in the self-healing agent. This was further confirmed by imaging fracture plane surfaces via scanning electron microscopy (SEM). The adhesive repair was typically ~100 μm in thickness, comparable to damage voids present in impact damaged FRP Composite materials.

  • characterization and analysis of carbon fibre reinforced Polymer Composite laminates with embedded circular vasculature
    Journal of the Royal Society Interface, 2010
    Co-Authors: C Y Huang, R S Trask, Ian P Bond
    Abstract:

    A study of the influence of embedded circular hollow vascules on structural performance of a Fibre-Reinforced Polymer (FRP) Composite laminate is presented. Incorporating such vascules will lead to multi-functional Composites by bestowing functions such as self-healing and active thermal management. However, the presence of off-axis vascules leads to localized disruption to the fibre architecture, i.e. resin-rich pockets, which are regarded as internal defects and may cause stress concentrations within the structure. Engineering approaches for creating these simple vascule geometries in conventional FRP laminates are proposed and demonstrated. This study includes development of a manufacturing method for forming vascules, microscopic characterization of their effect on the laminate, finite element (FE) analysis of crack initiation and failure under load, and validation of the FE results via mechanical testing observed using high-speed photography. The failure behaviour predicted by FE modelling is in good agreement with experimental results. The reduction in compressive strength owing to the embedding of circular vascules ranges from 13 to 70 per cent, which correlates with vascule dimension.

  • a hollow fibre reinforced Polymer Composite encompassing self healing and enhanced damage visibility
    Composites Science and Technology, 2005
    Co-Authors: Jody W.c. Pang, Ian P Bond
    Abstract:

    Abstract The aim of this study was to develop a novel fibre reinforced plastic which employed a biomimetic approach to undertake self-repair and visual enhancement of impact damage by a bleeding action from filled hollow fibres. The results of flexural testing have shown that for the lay-up investigated, a significant fraction of flexural strength lost after impact damage can be restored by the self-repairing effect of a healing resin stored within hollow fibres. The release and infiltration of an UV fluorescent dye from fractured hollow fibres into damage sites within the internal structure of the Composite has been successfully demonstrated. It has been correlated with respect to the ultrasonic C-scan NDT/NDE technique and shown to be an effective method of quickly and easily highlighting damage at the surface that requires further investigation. This could be of particular benefit where rapid visual inspection of large surface areas (e.g., wing skins) is required.

Mohammad Jawaid - One of the best experts on this subject based on the ideXlab platform.

  • Mechanical properties of kenaf fibre reinforced Polymer Composite: A review
    Construction and Building Materials, 2015
    Co-Authors: Naheed Saba, Md Tahir Paridah, Mohammad Jawaid
    Abstract:

    Kenaf regarded as an industrial crop in Malaysia and also grown commercially in other part of world for different applications. It is certainly one of the important plants cultivated for natural fibres globally, next to cotton, which is endemic to ancient Africa. It has great potential to use as automotive and construction materials due its long fibres derived from outer fibrous bark, the bast. Natural fibres such as kenaf getting attention of researchers and industries to utilize it in different Polymer Composites based products due to environmental awareness of consumers and government regulation in some countries. In many research studies, kenaf fibres are reinforced with Polymer matrix to form fibre reinforced Polymeric Composites which perfectly improve the features of the Polymers. Mechanical properties of kenaf fibres is comparable to existing materials and it will play an important role to utilize as the material of choice for a varied range of structural and non-structural industrial products with Polymer matrix. The innumerable properties of kenaf fibres in original and reprocessed plastics are demonstrated by many recent studies and research efforts make it suitable construction materials (such as boards of different densities, breadths, along with fire and insect resistance). In this review work, we try to explore and highlights the previous work involving mechanical properties of kenaf fibre reinforced Polymer Composites to provide a perfect source of literature for doing further research in this topic to explore it as construction and building materials.

Naheed Saba - One of the best experts on this subject based on the ideXlab platform.

  • Mechanical properties of kenaf fibre reinforced Polymer Composite: A review
    Construction and Building Materials, 2015
    Co-Authors: Naheed Saba, Md Tahir Paridah, Mohammad Jawaid
    Abstract:

    Kenaf regarded as an industrial crop in Malaysia and also grown commercially in other part of world for different applications. It is certainly one of the important plants cultivated for natural fibres globally, next to cotton, which is endemic to ancient Africa. It has great potential to use as automotive and construction materials due its long fibres derived from outer fibrous bark, the bast. Natural fibres such as kenaf getting attention of researchers and industries to utilize it in different Polymer Composites based products due to environmental awareness of consumers and government regulation in some countries. In many research studies, kenaf fibres are reinforced with Polymer matrix to form fibre reinforced Polymeric Composites which perfectly improve the features of the Polymers. Mechanical properties of kenaf fibres is comparable to existing materials and it will play an important role to utilize as the material of choice for a varied range of structural and non-structural industrial products with Polymer matrix. The innumerable properties of kenaf fibres in original and reprocessed plastics are demonstrated by many recent studies and research efforts make it suitable construction materials (such as boards of different densities, breadths, along with fire and insect resistance). In this review work, we try to explore and highlights the previous work involving mechanical properties of kenaf fibre reinforced Polymer Composites to provide a perfect source of literature for doing further research in this topic to explore it as construction and building materials.

Jang Kyo Kim - One of the best experts on this subject based on the ideXlab platform.

  • effects of silane surfactant on nano zno and rheology properties of nano zno epoxy on the uv absorbability of nano zno epoxy micron hgf Composite
    Composites Part B-engineering, 2016
    Co-Authors: Tsz Ting Wong, Kintak Lau, Wai Yin Tam, Julie A Etches, Jang Kyo Kim
    Abstract:

    Abstract Nano-zinc oxide (nano-ZnO)/epoxy filled micron-hollow glass fibres (micron-HGFs) epoxy Composite is opening up a new configuration for fibre reinforced Polymer Composite (FRPC) with enhanced ultraviolet (UV) resistibility. ZnO nanoparticles having intrinsic UV absorbability were introduced into epoxy and nano-ZnO/epoxy was filled into 100 μm HGF by using vacuum infiltration technique. 4 wt.% 100 nm ZnO/epoxy/100 μm HGF epoxy Composite was found to have the highest UV absorbability among other samples. The silane surfactant on ZnO nanoparticle (NP) was evaluated and the rheology of nanofluid (NF) was investigated for the UV absorbability of nanoComposite (NC), which the two parameters determine the dispersion of ZnO nanoparticles and the Polymerization shrinkage of nanoComposite. An optimum concentration and good dispersion of ZnO nanoparticles are aimed to be achieved in order to maximize the UV absorbability of nano-ZnO/epoxy/micron-HGF epoxy Composite. The silane surfactant on ZnO nanoparticle was found to be ineffective for UV absorption.

S Luke - One of the best experts on this subject based on the ideXlab platform.

  • integration and assessment of fibre bragg grating sensors in an all fibre reinforced Polymer Composite road bridge
    Sensors and Actuators A-physical, 2005
    Co-Authors: Y M Gebremichael, L Canning, W J O Boyle, B T Meggitt, K T V Grattan, B Mckinley, G F Fernando, G Kister, D Winter, S Luke
    Abstract:

    Abstract This paper reports on the integration and assessment of 40 ruggedly protected fibre Bragg grating sensors (FBGs) in an all-glass fibre reinforced Polymer Composite road bridge. This bridge is reported to be Europe's first all-fibre reinforced Composite bridge. A unique feature of this bridge was that it was constructed from pultruded glass fibre Composite sections, which were bonded on site. The FBGs were integrated at specified sections during the assembly and bonding phase of the bridge. The primary functions of the fibre optic sensors were to provide: (i) real-time and in situ strain and temperature data from the bridge and (ii) strain data to enable the validation of design codes for the all-Composite bridge. Results from laboratory tests and field trials during the proof testing of the bridge are presented. The latter included loading the bridge with a 30 tonne lorry.