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  • NRN106 - A new framework for polyconvex large strain electromechanics: Variational formulation and material characterisation

    Science Direct

    • Modelling, 
    • Knowledge Transfer, 
    • Materials

    Following the recent work of Bonet et al. (2015), this paper postulates a new convex multi-variable variational framework for the analysis of Electro Active Polymers (EAPs) in the context of reversible nonlinear electro-elasticity. This extends the concept of polyconvexity (Ball, 1976) to strain energies which depend on non-strain based variables introducing other physical measures such as the electric displacement.

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  • NRN106 - A new framework for polyconvex large strain electromechanics: Finite element discretisation and computational implementation

    Science Direct

    • Modelling, 
    • Knowledge Transfer, 
    • Materials

    The aim of this paper is to present, as an example, the Finite Element implementation of two of these mixed variational principles. These types of enhanced methodologies are known to be necessary in scenarios in which the simpler displacement-potential based formulation yields non-physical results, such as volumetric locking, bending and shear locking, pressure oscillations and electro-mechanical locking, to name but a few.

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  • NRN106 - On a tensor cross product based formulation of large strain solid mechanics

    Science Direct

    • Modelling, 
    • Knowledge Transfer, 
    • Materials

    This paper describes in detail the formulation of large strain solid mechanics based on the tensor cross product, originally presented by R. de Boer (1982) and recently re-introduced by Bonet et al. (2015a) and Bonet et al. (2015b). The paper shows how the tensor cross product facilitates the algebra associated with the area and volume maps between reference and final configurations.

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  • NRN106 - A computational framework for polyconvex large elasticity for geometrically exact beam theory

    Springer International Publishing

    • Modelling, 
    • Knowledge Transfer, 
    • Materials

    In this paper, a new computational framework is presented for the analysis of nonlinear beam finite elements subjected to large strains.

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  • NRN113 - Synthesis and super-resolution imaging performance of a refractive-index-controllable microsphere superlens

    Royal Society of Chemistry

    • Sensors and Devices, 
    • Knowledge Transfer

    In this study, we demonstrate for the first time a nanoparticle-hybrid suspension polymerization approach to chemically synthesize high-quality microspheres (ZrO2/polystyrene) with optical properties that are highly controllable.

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