Andrew Rhead
University of Bath
Composite numberFinite element methodWorld Wide WebComposite laminatesComposite materialAerospaceCompression (physics)Materials scienceDamage toleranceSequence (medicine)CouponStiffnessImpact energyX ray dataCompressive strengthStackingComputer scienceStructural engineeringDelaminationCrystallographyBuckling
115Publications
10H-index
329Citations
Publications 115
Newest
#1Tomás R. C. Chuaqui (University of Bath)H-Index: 3
#2Andrew Rhead (University of Bath)H-Index: 10
Last. Carl Scarth (University of Bath)H-Index: 7
view all 4 authors...
Abstract null null A novel Bayesian optimisation framework is proposed for the design of stronger stacking sequences in composite laminates. The framework is the first to incorporate high-fidelity progressive damage finite element modelling in a data-driven optimisation methodology. Gaussian process regression is used as a surrogate for the finite element model, minimising the number of computationally expensive objective function evaluations. The case of open-hole tensile strength is investigat...
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Small diameter thin-walled pipes, typically with a diameter less than 20 mm and a ratio of outer diameter to wall thickness is 20 or above, have increasingly become a key value adding factor for a number of industries including medical applications, electronics and chemical industries. In high-energy physics experiments, thin-walled pipes are needed in tracking detector cooling systems where the mass of all components needs to be minimised for physics measurement reasons. The pipework must relia...
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#1Anton Köllner (Imperial College London)H-Index: 5
#2Mark Nielsen (University of Bath)H-Index: 2
Last. Richard Butler (University of Bath)H-Index: 21
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Abstract Two state-of-the-art analytical compression after impact (CAI) modelling approaches are presented and evaluated for the problem of thin-film buckle-driven propagation of a delamination in composite laminates. Characteristic phenomena are investigated by evaluating the behaviour of the energy release rate of an anisotropic sublaminate above a 2D embedded delamination. These characteristics include extension-bend, shear-bend and bend-twist coupling as well as contact of sublaminate and ba...
2 CitationsSource
#1Tomás R. C. Chuaqui (University of Bath)H-Index: 3
#2Mark Nielsen (University of Bath)H-Index: 2
Last. Andrew Rhead (University of Bath)H-Index: 10
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Abstract The failure strength of carbon-fibre reinforced plastic laminates under open-hole tension varies considerably with ply angle, ply blocking and loading direction. Here, laminates with various standard-angle and non-standard angle stacking sequences are subjected to both on- and off-axis loading in a comprehensive experimental and progressive damage finite element analysis testing campaign. It is found that interlaminar and intralaminar matrix damage can be beneficial when accumulated sub...
2 CitationsSource
#1Tomás R. C. Chuaqui (University of Bath)H-Index: 3
#2E. Sebastian (University of Bath)H-Index: 1
Last. Richard Butler (University of Bath)H-Index: 21
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Abstract The certification and quality control of large aerostructures relies on testing of small-scale coupons, which may be unrepresentative of the final product. Edge effects, which are either non-existent or less significant in large aerospace components, cause coupon failure and often lead to considerable strength underpredictions. In this work, a resin treatment is applied to the edges of short beam specimens, resulting in a net strength improvement of 16% and 36% in laminates using two ca...
2 CitationsSource
#1Lucie Culliford (University of Bath)H-Index: 1
#2R.S. Choudhry (University of Derby)H-Index: 6
Last. Andrew Rhead (University of Bath)H-Index: 10
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Abstract Continuous variation of stiffness across flat plates has been shown, theoretically, to improve buckling performance by up to 60%. However, steered fibre manufacturing methods cannot achieve the minimum radius of curvature required for improvement whilst maintaining a high deposition rate. An alternative concept, Discrete Stiffness Tailoring (DST), which varies stiffness within a ply through discrete changes of angle, is compatible with high rate deposition methods such as Advanced Tape ...
1 CitationsSource
#1Zsombor Sápi (University of Bath)H-Index: 2
#2Sam Hutchins (GKN)H-Index: 1
Last. Andrew Rhead (University of Bath)H-Index: 10
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Abstract In the manufacture of the out-of-plane joints of composite stiffened panels, such as the connection between skin and T, I, omega shaped stiffeners, a filler material is needed to fill the void between the flanges, web and skin. The most common filler is a rolled unidirectional prepreg tape (“noodle”), which is not only expensive to manufacture, but also has low strength that can lead to premature failure of the loaded joint. In this work, eight novel filler concepts are introduced and e...
1 CitationsSource
#1Hector F. ArchilaH-Index: 1
#2Andrew Rhead (EPSRC: Engineering and Physical Sciences Research Council)H-Index: 10
Last. Juan Lizarazo-MarriagaH-Index: 9
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Novel cross-laminated bamboo panels comprising three and five layers (G-XLam3 and G-XLam5) were tested in compression along the main (0°) and the transverse (90°) directions. Linear variable differential transformer (LVDT) and non-contact three-dimensional digital image correlation (DIC) measuring techniques were used separately to measure deformation in the elastic region, and the elastic moduli, EpC,0 and EpC,90, were derived. Mean elastic modulus values obtained using LVDTs exhibited a good m...
1 CitationsSource
#1Zsombor Sápi (University of Bath)H-Index: 2
#2Richard Butler (University of Bath)H-Index: 21
Last. Andrew Rhead (University of Bath)H-Index: 10
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Abstract Composite T-joints and similar skin-stiffener joints have a central role in aerospace structures. However, their accurate numerical analysis is still a great challenge due to their complex geometry and stress state during loading. In this work, an experimentally validated high-fidelity finite element model is developed to simulate the failure of a T-joint subjected to tensile loading. For the first time in literature, the model accounts for the shape of the manufactured filler, ply thic...
5 CitationsSource