Accession Number : ADA307616

Title :   Filament-Reinforced Metal Composite Pressure Vessel Evaluation and Performance Demonstration.

Descriptive Note : Final rept. Jul 72-Oct 75,

Corporate Author : STRUCTURAL COMPOSITES INDUSTRIES INC POMONA CA

Personal Author(s) : Landes, R. E.

PDF Url : ADA307616

Report Date : MAY 1976

Pagination or Media Count : 418

Abstract : Advantages of filament overwrapped metal composite pressure vessels for future flight vehicles and the technology readiness of the vessels for the application were verified in this full scale hardware demonstration program. Two different Kevlar-49 filament reinforced metal sphere designs were developed, and six vessels of each type were fabricated and subjected to performance tests consisting of fatigue cycling, sustained loading, and hydrostatic burst. The 61 cm (24 inch) diameter Kevlar-49/cryoformed 301 stainless steel pressure vessels demonstrated the required pressure cycle capability, burst factor of safety, and a maximum pressure times volume divided by weight (pV/W) performance of 210 J/g (834 000 in-lb/lbm) at burst; this represented a 25-30% weight saving over the lightest weight comparable, 6Al-4V Ti, homogeneous pressure vessel. In addition to these capabilities of the Kevlar/stainless steel spherical vessels, both the Kevlar/stainless steel design and the 97 cm (38 inch) diameter Kevlar-49/2219-T62 aluminum sphere design demonstrated the anticipated safety characteristics of composite vessels consisting of non-fragmentation and controlled failure mode features when pressure cycled to failure at operating pressure; when failure occurred during pressure cycling, the mode was localized leakage and not catastrophic. Kevlar/stainless steel vessels utilized a unique conical boss design, and Kevlar/aluminum vessels incorporated a tie-rod to carry port loads; both styles of polar fittings performed as designed during operational testing of the vessels.

Descriptors :   *FILAMENT WOUND CONSTRUCTION, *PRESSURE VESSELS, *BURSTING STRENGTH, DEMONSTRATIONS, COMPOSITE MATERIALS, POLYAMIDE PLASTICS, STAINLESS STEEL, SAFETY, FAILURE(MECHANICS), HOMOGENEITY, FITTINGS.

Subject Categories : Containers and Packaging

Distribution Statement : APPROVED FOR PUBLIC RELEASE