Accession Number : AD0824322

Title :   MICROMECHANICS OF HIGH STRENGTH, LOW DENSITY, BORON FILAMENT REINFORCED ALUMINUM METALLIC COMPOSITES, PART I.

Descriptive Note : Part 1 of Summary rept.,

Corporate Author : AVCO MISSILES SPACE AND ELECTRONICS GROUP WILMINGTON MA AVCO SPACE SYSTEMS DI V

Personal Author(s) : Lenoe, E. M.

Report Date : MAY 1967

Pagination or Media Count : 186

Abstract : To obtain a more detailed knowledge of the distribution of stresses and the transfer of loads in a continuous-filament-reinforced metal matrix and, in particular, to assess the role of residual stresses for such a material. Of particular significance is the demonstration that the high modulus values expected of boron-reinforced aluminum composites have been achieved. In addition, data presented exhibit rather remarkable strength retention for these composites for temperatures of the order of 900 to 1000F. Behavior of boron filament: The influence of gage length and temperature, as well as the effect of strain rate on fiber response, was investigated. Also presented is a statistical characterization of uniaxial tensile modulus, total strain to failure, and ultimate strength. Predicted and observed filament-bundle strengths are compared. Results of model composite studies and photoelastic investigations are discussed, and finally, some theoretical considerations are presented, as well as conclusions and recommendations as to directions for future research.

Descriptors :   (*COMPOSITE MATERIALS, MECHANICAL PROPERTIES), (*ALUMINUM, COMPOSITE MATERIALS), (*BORON, COMPOSITE MATERIALS), FILAMENTS, REINFORCING MATERIALS, LOADS(FORCES), STRESSES, DISTRIBUTION, STRAIN(MECHANICS), FAILURE(MECHANICS), TENSILE PROPERTIES, POWDER METALLURGY, MATERIAL FORMING, VISCOELASTICITY, PHOTOELASTICITY.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE