Accession Number : ADA551922


Title :   Fluid Structure Interaction Effect on Sandwich Composite Structures


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Violette, Michael A


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA551922


Report Date : Sep 2011


Pagination or Media Count : 73


Abstract : The objective of this research is to examine the fluid structure interaction (FSI) effect on composite sandwich structures under a low velocity impact. The primary sandwich composite used in this study was a 6.35-mm balsa core and a multi-ply symmetrical plain weave 6 oz E-glass skin. The specific geometry of the composite was a 305 by 305 mm square with clamped boundary conditions. Using a uniquely designed vertical drop-weight testing machine, there were three fluid conditions in which these experiments focused. The first of these conditions was completely dry (or air) surrounded testing. The second condition was completely water submerged. The final condition was a wet top/air-backed surrounded test. The tests were conducted progressively from a low to high drop height to best conclude the onset and spread of damage to the sandwich composite when impacted with the test machine. The measured output of these tests was force levels and multi-axis strain performance. The collection and analysis of this data will help to increase the understanding of the study of sandwich composites, particularly in a marine environment.


Descriptors :   *COMPOSITE MATERIALS , *FLUIDS , *SANDWICH CONSTRUCTION , COMPOSITE STRUCTURES , DROP TESTS , IMPACT , INTERACTIONS , MOISTURE CONTENT , TEST AND EVALUATION , TEST EQUIPMENT , THESES , VERTICAL ORIENTATION


Subject Categories : Laminates and Composite Materials
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE