Accession Number : AD0690964

Title :   MICROCONTINUUM APPROACH IN FRACTURE MECHANICS.

Descriptive Note : Technical rept.,

Corporate Author : NOTRE DAME UNIV IND COLL OF ENGINEERING

Personal Author(s) : Ariman,Teoman ; Zika,Michael J.

Report Date : JUN 1969

Pagination or Media Count : 42

Abstract : The aim of this paper is to investigate the use of the theory of micropolar continua in fracture mechanics. The theory of micropolar continua is concerned with material media whose constituents are dumbbell molecules. These elements are allowed to rotate independently, without stretch. In other words, besides the macro deformation, the microrotation of the elements of the media, represented by an axial vector, is also taken into account. However, this microrotation vector, which is found to be responsible for developing a couple stress in the field, is kinematically independent and is not related to the displacement vector. Physically solid propellant grains, polymeric materials and fiberglas are but a few examples for such materials. The theory is expected to find applications in the treatment of microcracks and microfracture. (Author)

Descriptors :   (*FRACTURE(MECHANICS), CONTINUUM MECHANICS), MICROSTRUCTURE, CRACKS, MOLECULAR STRUCTURE, DEFORMATION, STRESSES, ELASTIC PROPERTIES, COMPLEX VARIABLES, GEOMETRIC FORMS, CONFORMAL MAPPING, TRANSFORMATIONS(MATHEMATICS), GRAIN STRUCTURES(METALLURGY), ROCKET PROPELLANT GRAINS, POLYMERS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE