Browsing by Author "Richards, D. M."

Now showing 1 - 3 of 3
  • Thumbnail Image
    ItemOpen Access
    Application of inflated structures to hovercraft annual survey 1968-69: inflated structures report C1206/3
    (College of Aeronautics, 1969-09) Richards, D. M.
    1.0 Introduction This report surveys work carried out in the Department of Aircraft Design at the College of Aeronautics, Cranfield, in accordance with the terms of Ministry of Technology contract reference PD/28/045/ADM, College of Aeronautics reference 0.1206. The period covered by this report extends from 1st October 1968 to 1st October 1969, which constitutes the first complete year of operation under the contract terms. The reporting procedure agreed with Mintech is that individual research topics shall be separately reported in the form of technical memoranda, and that comprehensive surveys of a descriptive nature shall be submitted at regular intervals.
  • Thumbnail Image
    ItemOpen Access
    The measurement of biaxial strains in coated fabric materials using the disc-replica method
    (College of Aeronautics, 1969-09) Webb, J.; Richards, D. M.
    A method of measuring biaxial strains in coated fabric type materials is presented whereby the strain is deduced from the distortion of a circular impression made on the material. The impression is placed on the material when loaded, enabling all measurements to be made with the material in its relaxed, unloaded, state.
  • Thumbnail Image
    ItemOpen Access
    The minimum weight design of compression structures including plasticity effects
    (Cranfield University, 1977-11) Richards, D. M.; Howe, D.
    The minimum weight design of a wide range of structures required to resist compressive loading is considered. Items which have been analysed in detail include struts of various sorts, thin plates, honeycomb core sandwich panels, wide column stiffened panels, stiffened panels with optimised support locations, and cylindrical shells stiffened by axial stiffners and rings. A further study is concerned with the effects of imperfections on a tower with corrugation stiffened walls, loaded in compression. - Except for the corrugated tower, each analysis includes the effects of plasticity in a direct and realistic way by characterising stress-strain behaviour in the manner suggested by Ramberg and Osgood. Results for each type of structure are presented, together with the appropriate computer programmes.