Accession Number : AD0482778

Title :   PHYSICOMECHANICAL BEHAVIOR OF RUBBERLIKE MATERIALS.

Descriptive Note : Annual rept. no. 2, 2 Feb 65-31 Jan 66,

Corporate Author : CALIFORNIA INST OF TECH PASADENA W M KECK LAB OF ENGINEERING MATERIALS

Personal Author(s) : Blatz, Paul J.

Report Date : 31 JAN 1966

Pagination or Media Count : 86

Abstract : During the past year, further progress was made in understanding both the molecular nature of the strain energy function of a homogeneous, nearly incompressible rubberlike material. The importance of non-affinity of deformation, chain stiffness, and volume exclusion in modifying the basic statistical model of Kuhn, Grun, James and Guth are discussed. A phenomenological theory for predicting the distribution of times-to-break arising in creep failure in terms of the growth of defects in rubber was proposed and showed good agreement with experimental data. Batches of thermoelastic rubber filled with glass beads are being prepared prior to evaluation in terms of sedimentation theory. (Author)

Descriptors :   (*SYNTHETIC RUBBER, ELASTIC PROPERTIES), MATHEMATICAL ANALYSIS, MATHEMATICAL PREDICTION, THERMAL PROPERTIES, MECHANICAL PROPERTIES, CREEP STRENGTH, STOCHASTIC PROCESSES, TENSILE PROPERTIES, STATISTICAL ANALYSIS, SULFUR, DEFECTS(MATERIALS), VULCANIZATES, STRESSES, PLASTICIZERS, CRAZING.

Subject Categories : Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE