Accession Number : ADA331208

Title :   Ultralight Metal Structures.

Descriptive Note : Fiscal year letter 1 Oct 96-30 Sep 97,

Corporate Author : HARVARD UNIV CAMBRIDGE MA

Personal Author(s) : Evans, Anthony G.

PDF Url : ADA331208

Report Date : SEP 1997

Pagination or Media Count : 18

Abstract : The major challenge for implementation of cellular metals involves their multifunctional nature. That is, their performance attributes relative to competing materials are rarely based on a single property category. Moreover, few applications rely solely on specific mechanical or thermal properties. Combinations of these with other attributes, such as energy absorption, acoustic damping, etc. provide a performance benefit. Furthermore, implementation opportunities may not depend on performance, but rather on cost relative to other systems. The program is structured with this perspective. It combines property measurement and simulation with thermostructural concepts for components, code development, innovative processing concepts, data bases containing thermomechanical performance indices and software. To address multifunctionality, the CMS software will be expanded to include a cellular metals data base. A Shape subroutine has also been developed that interrelates materials selection with structurally efficient shapes, such as I-beams. That is, it mutually selects the minimum weight configuration and the preferred material. Extension to foam core configurations will be an essential step toward establishing ULS performance benefits.

Descriptors :   *THERMOMECHANICS, *METALS, *LIGHTWEIGHT, THERMAL PROPERTIES, DATA BASES, SIMULATION, MEASUREMENT, MECHANICAL PROPERTIES, PROCESSING, SHAPE, STRUCTURES, EFFICIENCY, SELECTION, ENERGY ABSORBERS.

Subject Categories : Metallurgy and Metallography
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE