Accession Number:

ADA229403

Title:

Micromechanics of Fatigue

Descriptive Note:

Final rept. 15 Mar 1989-14 Mar 1990,

Corporate Author:

LABORATOIRE DE MECANIQUE ET TECHNOLOGIE CACHAN (FRANCE)

Personal Author(s):

Report Date:

1990-05-13

Pagination or Media Count:

27.0

Abstract:

Brittle and ductile isotropic damage mechanisms are studied from a meso-mechanical view point. Relationships between crack density and void volume fraction defined at meso-scale on one hand, and a scaler internal variable characterizing damage on the other hand, are given. A general form for the evolution law for this damage variable is also derived from the same approach. A threshold which defines the onset of this evolution is derived from thermodynamical considerations. The ultimate stage of this evolution, i.e., the local failure is derived from localization criteria. JS

Subject Categories:

  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE