Accession Number : AD0763753

Title :   The Mechanics of Materials with Permanent Memory. Part I.

Descriptive Note : Technical rept.,

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF CIVIL ENGINEERING

Personal Author(s) : Quinlan,Michael H. ; Fitzgerald,J. Edmund

Report Date : JUL 1973

Pagination or Media Count : 87

Abstract : The report deals with the stress constitutive problem for a class of materials typified by highly filled propellants. These materials exhibit both permanent and fading memory effects. The permanent memory effect is due to damage or microstructural weakening. A particular deformation history causes a certain damage. The stress response depends on this state of damage together with the deformation history itself. Introducing the idea of a damage functional, the stress response functional is assumed to depend on the history of that functional in addition to the deformation history itself. A topological structure is then built in which the stress response functional can be assumed continuous and differentiable. A Taylor series type expansion of the stress response functional is taken about the rest deformation and damage history. The topological structure leads to a Hilbert space in which a representation for the first order approximation is obtained. (Modified author abstract)

Descriptors :   (*SOLID ROCKET PROPELLANTS, MECHANICAL PROPERTIES), ADDITIVES, SOLIDS, DEFORMATION, NUMERICAL ANALYSIS, VISCOELASTICITY, HILBERT SPACE

Subject Categories : Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE