C. Ruggieri et Rh. Dodds, PROBABILISTIC MODELING OF BRITTLE-FRACTURE INCLUDING 3-D EFFECTS ON CONSTRAINT LOSS AND DUCTILE TEARING, Journal de physique. IV, 6(C6), 1996, pp. 353-362
This study presents a probabilistic, 3-D framework to describe brittle
fracture in structural components which incorporates weakest link sta
tistics and a micromechanics model reflecting local damage of material
. The Weibull stress (a,) emerges as a fracture parameter to define co
nditions leading to local material failure. This parameter is correlat
ed with the macroscopic loading and used to describe overall fracture
conditions in a cracked solid exhibiting both loss of constraint and s
table crack growth prior to cleavage fracture. The paper also describe
s an application of the proposed framework to predict the measured geo
metry and ductile tearing effects on the statistical distribution of c
leavage fracture toughness for an HSLA steel.