Accession Number : AD0456718

Title :   THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE TENSILE MODULI OF PARALLEL FILAMENT COMPOSITES,

Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS

Personal Author(s) : Melvin, John W.

Report Date : OCT 1964

Pagination or Media Count : 39

Abstract : The tensile modulus of silicone rubber was determined over a range of temperature from room temperature down to -200 F. The values obtained extended over approximately three orders of magnitude. Knowledge of the modulus variation with temperature was used to evaluate the applicability of theoretical expressions for the longitudinal and transverse tensile moduli of a silicone rubber-glass filament composite which was tested under the same temperature conditions. The expression for the longitudinal modulus derived from the simple parallel model was in agreement with the observed experimental results. In one case, severe catenary caused a large discrepancy between theory and experiment at low matrix modulus values but at higher E sub m values the effect disappeared. Thus, when even a moderate amount of catenary is present the theory predicts the longitudinal modulus successfully. (Author)

Descriptors :   (*COMPOSITE MATERIALS, TENSILE PROPERTIES), (*LAMINATED PLASTICS, TENSILE PROPERTIES), GLASS TEXTILES, REINFORCING MATERIALS, FILAMENT WOUND CONSTRUCTION, FILAMENTS, ELASTIC PROPERTIES, THEORY, TEST METHODS, SILICONE PLASTICS, LOW TEMPERATURE.

Distribution Statement : APPROVED FOR PUBLIC RELEASE