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  • CONFERENCE PAPER
    Suzuki-Vidal F, Lebedev SV, Krishnan M, Bocchi M, Skidmore J, Swadling G, Harvey-Thompson AJ, Burdiak G, de Grouchy P, Pickworth L, Suttle L, Bland SN, Chittenden JP, Hall GN, Khoory E, Wilson-Elliot K, Madden RE, Ciardi A, Frank Aet al., 2012,

    Laboratory astrophysics experiments studying hydrodynamic and magnetically-driven plasma jets

    , 14th Latin American Workshop on Plasma Physics (LAWPP), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
  • JOURNAL ARTICLE
    Wilson LA, Tallents GJ, Pasley J, Whittaker DS, Rose SJ, Guilbaud O, Cassou K, Kazamias S, Daboussi S, Pittman M, Delmas O, Demailly J, Neveu O, Ros Det al., 2012,

    Energy transport in short-pulse-laser-heated targets measured using extreme ultraviolet laser backlighting

    , PHYSICAL REVIEW E, Vol: 86, ISSN: 1539-3755
  • JOURNAL ARTICLE
    Winter RE, Cotton M, Harris EJ, Chapman DJ, Eakins D, McShane Get al., 2012,

    Plate-impact loading of cellular structures formed by selective laser melting

    , WIT Transactions on the Built Environment, Vol: 126, Pages: 145-156, ISSN: 1743-3509

    Studies of the shock loading of porous material have the potential to improve our understanding of factors such as density, crush strength and pore size on energy absorbing capability. Porous components were manufactured using Selective Laser Melting (SLM) in which layers of metal powder are fused together to create a structure specified by an electronic file. Samples have been manufactured in which a lattice is formed by an array of intersecting rods angled at 45 degrees to the surface of a 6 mm thick x ~100 mm diameter disc. The cell size is 1 mm 3 and the density is 44.6% of solid. A 100 mm gas gun has been used to impact the porous samples onto solid stainless steel plates. Het-V laser interferometry was used to measure the velocity vs. time profile of the transmitted shock. The experimental results were compared with three dimensional computer predictions. It was found that the simulations reproduced the main features of the experimental record but tended to underestimate the measured velocities, suggesting that the codes were not calculating the energy absorbed by the lattice correctly. Additional calculations were performed with the aim of building a picture of the processes of energy absorption in cellular materials whose structure is varied systematically. These supporting studies suggest a possible explanation for the observed computational/experimental discrepancies. © 2012 British Crown.

  • JOURNAL ARTICLE
    Gaffney JA, Rose SJ, 2011,

    The effect of unresolved transition arrays on plasma opacity calculations

    , HIGH ENERGY DENSITY PHYSICS, Vol: 7, Pages: 240-246, ISSN: 1574-1818
  • JOURNAL ARTICLE
    Hill EG, Rose SJ, 2011,

    Alternative methods of producing photoionised plasmas in the laboratory

    , HIGH ENERGY DENSITY PHYSICS, Vol: 7, Pages: 377-382, ISSN: 1574-1818
  • JOURNAL ARTICLE
    Chapman DJ, Radford DD, Reynolds M, Church PDet al., 2005,

    Shock induced void nucleation during Taylor impact

    , International Journal of Fracture, Vol: 134, Pages: 41-57, ISSN: 0376-9429
  • JOURNAL ARTICLE
    Eakins D, Chapman D,

    The influence of particle morphology on the dynamic densification of metal powders

    , AIP Conference Proceedings, Vol: 1426, Pages: 1491-1494, ISSN: 1551-7616

    Powders are well known for their dispersive properties, which derive from the many dissipative processes that occur during densification. While numerous studies have been devoted to understand these processes over a wide range of initial densities, the influence of particle morphology has been for the large part overlooked. In this paper, we discuss a new research campaign at the Institute of Shock Physics, to systematically investigate the role of starting configuration on the dynamic densification of metal powders. Multi-target gun loading experiments have been performed on both stainless steel and copper powders of equiaxed-and fiber-shaped morphology. Frequency-shifted PDV was employed to measure the structure and velocity of the dynamic densification wave, to yield the crush strength of the various powders. We find that while the crush strength for the stainless steel powders is reasonably described by a modifiedWu-Jing model, this model underpredicts the densification stress for the copper powder.

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