Accession Number : AD0707100

Title :   SIMILARITY BETWEEN CREEP RUPTURE IN VISCOELASTIC SOLIDS AND FATIGUE IN METALS.

Descriptive Note : Technical rept.,

Corporate Author : SOUTH DAKOTA STATE UNIV BROOKINGS DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Wnuk,Michael P.

Report Date : APR 1970

Pagination or Media Count : 80

Abstract : A local energy criterion of Irwin's type is applied to a problem of a quasi static extension of a crack embedded in an elastic-plastic or visco-elastic-plastic matrix. The creep rupture under sustained loads and fatigue crack propagation, both described by the above equation, are shown to follow almost identical mathematical representations. The essential features such as the 'universal' resistance curves, the dependence of growth rate on the current K-factor and te amount of growth vs. time relations are shown to be strikingly similar. (Author)

Descriptors :   (*CREEP, SOLIDS), (*FATIGUE(MECHANICS), METALS), RUPTURE, VISCOELASTICITY, NONLINEAR DIFFERENTIAL EQUATIONS, CRACK PROPAGATION

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE