Accession Number:

AD0600112

Title:

CELLULAR ALUMINUM FOR USE IN ENERGY DISSIPATION SYSTEMS.

Descriptive Note:

Technical rept.,

Corporate Author:

FRANKFORD ARSENAL PHILADELPHIA PA

Personal Author(s):

Report Date:

1964-04-01

Pagination or Media Count:

38.0

Abstract:

The compressive properties of cast cellular aluminum alloy cylinders were studied. The principal criterion for material evaluation was high energy absorption at uniform levels of loading through substantially complete destruction of the material. The effects of alloy composition, cell structure, heat treatment, and lengthdiameter 1d ratio were studied. The most promising material was a cast 7075 aluminum alloy, heat treated to high hardness levels. The following conclusions were drawn Cellular cylinders of 7075-T6 material having uniform cell size and appropriate 1d ratios can provide for at least 15,000 ft-lblb of energy dissipation when the cylinder height has been reduced by 70 percent. High strength compositions heat treated to optimum strength levels offer the best promise for dissipation of energy at relatively constant levels of loading. Uniform cell size in the cellular structure favors uniform loading through the compressive deformation of the material. High 1d ratios more than 1.5 result in columnar instability and early catastrophic failure of the material. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE