Metal sandwich plates optimized for pressure impulses
By J. W. Hutchinson, Zhenyu Xue. International Journal of Mechanical Sciences, 2005
252 citations recorded by the source corpus.
Survival of a plate against an intense, short duration impulsive loading requires the circumvention of failure modes, including those associated with excessive overall deflection and shear-off at supports and webs. All-metal sandwich plates have distinct advantages over comparable weight monolithic plates, especially for intense water loadings. A recently developed mechanics of dynamically loaded sandwich plates by N. A. Fleck and V. S. Deshpande is extended and modified to address the problem of the minimum weight design of plates of given span that must sustain a uniformly distributed impulsive wave in air or water environments. Requirements for core crushing strength and energy absorption are discussed, as are conditions governing shear-off of the face sheet. Dimensionless parameters governing optimal designs are identified. Specific results are presented for plates with square honeycomb cores outlining trends for the best performance that can be achieved and the optimal distribution of mass between faces and core. Optimally designed sandwich plates can sustain water shocks that are two to three times as large monolithic plates of the same mass and material. The model is used to discuss a number of issues relevant to the design of effective metal sandwich plates, including differing requirements for air and water environments, face sheet shear-off resistance, the role of core strength, and the relation between small-scale tests and full-scale behavior.
Subfields: Civil and Structural Engineering, Mechanical Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/a31718a470e3b4b055e49903d85e5c1a69127a9e
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Citations in the corpus
- Multifunctional periodic cellular metals (2006, methodology): “A schematic illustration of the concept is shown in figure 20. Detailed finite element calculations using fully meshed geometries with square honeycomb, prismatic corrugations and pyramidal truss topologies made from materials defined by their yield strength, strain hardening rate, and strain rate s”
- Mechanical response of metallic honeycomb sandwich panel structures to high-intensity dynamic loading (2008, methodology): “Several groups have examined the dynamic response of sandwich structures to impulse loading [1] [2] [3] [4] [5].”
- Plastic Deformation, Failure and Energy Absorption of Sandwich Structures with Metallic Cellular Cores (2010, methodology): “Despite these approximations, the analysis has been shown to compare well with corresponding numerical simulations [141–145].”
- Compressive response of multilayered pyramidal lattices during underwater shock loading (2008, methodology): “For a bi-linear material with linear hardening rate, Xue and Hutchinson have proposed a dynamic strength law of the form [25]: scyD rcsy 1þ ffiffiffiffiffi Et E r V f cel y 1 , (8) where, Et is the tangent modulus and cel ¼ ffiffiffiffiffiffiffiffiffi E=r p is the elastic wave speed in the constitue”
- Crush dynamics of square honeycomb sandwich cores (2006, background): “04, representative of the relative density of sandwich plates of width 2 m with near-optimal design [1, 10].”
- The impulsive response of sandwich beams: analytical and numerical investigation of regimes of behaviour (2006, methodology): “Note that to a first approximation, the underwater blast performance of the sandwich beams can be estimated by correcting the impulse I in the manner suggested by Deshpande and Fleck (2005) or Hutchinson and Xue (2005) .”
- Dynamic crushing and energy absorption of regular, irregular and functionally graded cellular structures (2011, background): “Decreasing the relative density in the direction of crushing was shown to enhance the energy absorption of honeycombs at early stages of crushing.”
- Response of metallic pyramidal lattice core sandwich panels to high intensity impulsive loading in air (2011, background): “After the beneficial FSI effect had been confirmed in water [2-8], numerous sandwich panel concepts for impulse and pressure mitigation have been explored [7-17].”
- An underwater shock simulator (2006, background): “Refinements by Deshpande & Fleck (2005) and Hutchinson & Xue (2005) suggest that a larger fraction of the underwater shock momentum is transmitted into the sandwich than suggested by the Taylor (1941) analysis for a free-standing front face sheet.”