Author/Authors
anongba, p.n.b. université de cocody, 22 bp 582 22, - u f r sciences des structures de la matière et de technologie, Côte d’Ivoire , anongba, p.n.b. université de poitiers - laboratoire de physique des matériaux, umr cnrs 6630, France , bonneville, j. université de poitiers - laboratoire de physique des matériaux, umr cnrs 6630, France , joulain, a. université de poitiers - laboratoire de physique des matériaux, umr cnrs 6630, France
Title Of Article
BRITTLE CRACKS UNDER COMPRESSION : INTRODUCING POISSON EFFECT
شماره ركورد
31432
Abstract
An estimate is made of the contribution of Poisson effect to the conditions for the propagation of a planar crack subjected to uniform compression in the framework of linear isotropic elasticity. When comparison is made with tension, (1/v ) times larger stress is required to break a fracture specimen in compression (v is Poisson’s ratio). The treatment considers an inclined planar crack with respect to the applied compression direction and provides an expression of the crack extension force G per unit length of the crack front as a function of the inclination slope p of the crack. A representation of the crack by a continuous distribution of edge dislocations with infinitesimal Burgers vectors is adopted. It is shown that the inclined crack can be described by two distinct dislocation families responding to the applied compression and the induced internal Poisson tension, respectively.
From Page
37
NaturalLanguageKeyword
continuum mechanics , crack propagation , dislocations , Poisson effect , fracture mechanisms
JournalTitle
Revue Ivoirienne des Sciences et Technologie
To Page
53
JournalTitle
Revue Ivoirienne des Sciences et Technologie
Link To Document