Accession Number : ADA307827

Title :   Structural and Materials Investigation of a 1/8-Scale-Model Space Structure of Toroidal Configuration and Filamentary Construction.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER

Personal Author(s) : Williams, Jerry G. ; Goodman, George P.

PDF Url : ADA307827

Report Date : FEB 1965

Pagination or Media Count : 44

Abstract : A structural and materials investigation has been conducted on a 1/8-scale model of a proposed 30-foot-diameter torus space structure. Structural design of the model is based on the isotensoid concept in which filamentary material is wound in the torus meridional plane and oriented to carry primary radial structural loads as constant tension in the filaments. Inner and outer equatorial bands provide strength in the circumferential direction. Tests were per- formed on the model to determine dimensional stability, filament load distribution, hypervelocity impact, and structural failure. Test results indicated that the overall height of the meridian-plane cross section and the inner and outer diameters increased approximately linearly as the pressure was increased up to 56.0 psi. Strain-gage values of filament loading were approximately 18 percent less than theoretical values for the design operating pressure of 56.0 psi. Failure of the torus occurred at an internal pressure of approximately 94.O psi, which is approximately 34 percent of the design load based on ultimate strength of the filaments. Structural failure was a result of separation of adjacent torus filaments and not of failure of the filaments themselves.

Descriptors :   *MANNED SPACECRAFT, LOAD DISTRIBUTION, FILAMENT WOUND CONSTRUCTION, HYPERVELOCITY IMPACT, SCALE MODELS, COMPOSITE MATERIALS, LOADS(FORCES), FIBER REINFORCED COMPOSITES, STRAIN GAGES, TOROIDS, FILAMENTS, FAILURE(MECHANICS), RADIAL STRESS, INTERNAL PRESSURE.

Subject Categories : Laminates and Composite Materials
      Manned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE