Accession Number : AD0809840

Title :   FEASIBILITY OF GLASS-FILAMENT-WOUND PLASTICS FOR ARMY ROCKET MOTOR CASES. PROGRESS REPORT 2: FILAMENT WINDING OF NOL-TYPE RINGS FOR WEATHERING STUDY.

Descriptive Note : Technical rept.,

Corporate Author : PICATINNY ARSENAL DOVER N J PLASTICS AND PACKAGING LAB

Personal Author(s) : Miller,Donald

Report Date : DEC 1966

Pagination or Media Count : 89

Abstract : Several thousand NOL-type glass-reinforced plastic rings were wound on multi-ring mandrels for use in environmental tests. The winding process was studied in terms of effects of (1) varying fiber tension during winding, (2) varying resin viscosity, (3) heating the mandrel prior to cure, (4) humidity-aging the wound rings, and (5) making certain mechanical changes in the winding apparatus. Increasing the winding tension reduced ring strength by about 4.5%. Reducing the resin content at wetout (by heating the resin bath to 125%F) increased ring strength by 4.7%. Heating the strand before winding by passing it around a 150 F stationary cylinder after wetout decreased ring strength by 6.1%. Increasing the diameter of the pulley on the tensioning device from 1.2 to 5 inches increased ring strength by 1.3% for a 5000-gram tension and by 2.0% for an 1800-gram tension. Cutting the top fibers before cure of rings wound at 1800 grams tension reduced ring strength slightly, while similar modification of rings wound at the higher (5000 grams) tension increased ring strength by up to 5.7%. Heating the wound rings on the mandrel before cure increased the strength of rings made at low resin viscosity and low fiber tension. Humidity-aging the wound rings degraded their tensile properties. (Author)

Descriptors :   (*FILAMENT WOUND CONSTRUCTION, *PLASTICS), (*ROCKET ENGINE CASES, FILAMENT WOUND CONSTRUCTION), GLASS TEXTILES, REINFORCING MATERIALS, TENSILE PROPERTIES, DEGRADATION, RINGS, ENVIRONMENTAL TESTS, MANDRELS, VISCOSITY, AGING(MATERIALS), FEASIBILITY STUDIES, STRESSES, PROCESSING

Subject Categories : Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE