Accession Number : ADA488340


Title :   Blast and Fragment Protective Sandwich Panel Concepts for Stainless Steel Monohull Designs


Descriptive Note : Final rept. Dec 2002-Sep 2007


Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE OFFICE OF SPONSORED PROGRAMS


Personal Author(s) : Wadley, H G


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a488340.pdf


Report Date : 21 Oct 2008


Pagination or Media Count : 258


Abstract : The prevention or mitigation of ship hull damage from underwater explosions (UNDEX) is of vital need for surface combatant Naval ships. This research program sought to devise blast and ballistic protection concepts applicable to the design and fabrication of ship hull structures using AL6XN stainless steel sandwich panel constructions, which met threat and protection levels defined by the Navy. Efforts were undertaken in two phases to design, fabricate, experimentally investigate and analyze the quasi-static and dynamic behavior of sandwich beams and plates for several sandwich core topologies, at different size scales to evaluate their performance in underwater explosion (UNDEX), in air (AIREX), surface (SURFEX) and ballistic test environments. Several periodic cellular sandwich cores were assessed by performing dynamic uni-axial compression tests, stretch-bend type sub-scale (1/12th and 1/5th hill-scale) panel tests, and full- scale ballistic tests. Constitutive models were developed for the down selected core topologies to enable the implementation of more convenient large (ship) scale analyses. Soft response cores such as the prismatic cores and multilayer pyramidal cores were found better suited for water blast loading applications and ship hull blister attachments.


Descriptors :   *BEAMS(STRUCTURAL) , *STAINLESS STEEL , *SANDWICH CONSTRUCTION , *BLAST LOADS , HULLS(MARINE) , TEST METHODS , TOPOLOGY , UNDERWATER EXPLOSIONS , NAVAL VESSELS(COMBATANT) , SHIP HULLS , SHIP STRUCTURAL COMPONENTS , PRISMATIC BODIES , DYNAMIC RESPONSE , OCEAN SURFACE , PYRAMIDS(GEOMETRY) , TEST AND EVALUATION , NAVAL VESSELS


Subject Categories : Metallurgy and Metallography
      Structural Engineering and Building Technology
      Explosions


Distribution Statement : APPROVED FOR PUBLIC RELEASE