Accession Number : AD0474406


Title :   THERMAL AGING CHARACTERISTICS OF AERO-SPACE WIRE INSULATION.


Descriptive Note : Memorandum rept.,


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Brancato, E L ; Campbell, F J


Report Date : Jun 1960


Pagination or Media Count : 43


Abstract : Life versus temperature curves of wire and cable insulations are needed to provide aircraft design engineers with information to design electrical circuits utilizing the minimum wire sizes required to maintain maximum reliability and yet reduce weight and bulk to a minimum. To establish the feasibility of obtaining such curves a procedure, employing functional evaluation and principles of statistical analysis, was developed and applied to produce curves of five wires representing the variations in insulation layer constructions specified in MIL-W-5086A. Cycling temperature studies were conducted on three of these wires, verifying the application of a relative aging factor formula which can be used to convert cyclic aging to the equivalent aging of a single temperature exposure. (Author)


Descriptors :   *ELECTRIC WIRE , *ELECTRICAL INSULATION , *AGING(MATERIALS) , THERMAL STRESSES , CIRCUITS , LIFE EXPECTANCY(SERVICE LIFE) , DEGRADATION , ELECTRIC CABLES , HIGH TEMPERATURE , AIRCRAFT , MECHANICAL PROPERTIES , STRESSES , MATHEMATICAL PREDICTION , NOMOGRAPHS


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE