Time depdendent crack growth and failure in brittle rock

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6168867

Costin, L S; Mecholsky, J J

This paper reports the results of an experimental study aimed at relating the mechanism of stress corrosion crack growth to the time dependent failure of brittle rock. To this end, two types of experiments were performed. First, subcritical crack growth studies were performed to relate the velocity of crack growth to the applied stresses and environmental conditions (temperature and water content). Second, uniaxial compression tests were performed on the same rocks under the same environmental conditions. The compression tests were run over a range of strain rates in order to determine the ultimate failure stress as a function of strain rate. The results of the crack growth and compression tests were then analyzed in terms of a recently developed model which relates the state of microcracking in a brittle material to the deformation and failure characteristics of the continuum. The model was used to predict the results of the uniaxial compression tests based on input provided from the crack growth tests. Comparison of model predictions and experimental results is discussed in some detail.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6168867
• Report Number(s): SAND-83-0474c; CONF-830605-2; ON: DE83007940
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
BRITTLENESS
CHEMICAL REACTIONS
COMPRESSION STRENGTH
CORROSION
CRACK PROPAGATION
DATA
EXPERIMENTAL DATA
INFORMATION
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NUMERICAL DATA
ROCKS
STRESS CORROSION
VELOCITY