Damage accumulation due to microcracking in brittle rock under dynamic loading
This paper presents a constitutive model for the dynamic behavior of brittle rock. The essential feature of this model is the treatment of the dynamic fracture process in rock as a continuous accrual of damage where the damage mechanism is attributed to the growth and interaction of a pre-existing network of microcracks. Damage is measured by the volume fraction of the material which has lost its load-carrying capacity. Damage accumulates only under volumetric tension (hydrostatic or mean stress) and is irreversible in nature. In compression, the model gives an elastic/perfectly plastic material response. The model is implemented into a transient, two-dimensional, solid dynamics finite element code. Comparisons between numerical predictions and field data from an oil shale blasting experiment are made and shown to be in good agreement. 10 refs., 10 figs., 2 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5828515
- Report Number(s):
- SAND-85-0604C; CONF-850614-4; ON: DE85009503
- Resource Relation:
- Conference: ASME-ASCE fluids engineering conference and joint mechanics conference, Albuquerque, NM, USA, 24 Jun 1985
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dynamic brittle material response based on a continuum damage model
A new constitutive model for fragmentation of rock under dynamic loading
Related Subjects
04 OIL SHALES AND TAR SANDS
OIL SHALES
EXPLOSIVE FRACTURING
FRACTURE MECHANICS
FRACTURE PROPERTIES
POISSON RATIO
ROCK MECHANICS
MATHEMATICAL MODELS
ANVIL POINTS RESEARCH FACILITY
CRACKS
CRATERING EXPLOSIONS
DAMAGE
FINITE ELEMENT METHOD
STRATIGRAPHY
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
COMMINUTION
ENERGY SOURCES
EXPLOSIONS
FOSSIL FUELS
FRACTURING
FUELS
GEOLOGY
INDUSTRIAL PLANTS
MATERIALS
MECHANICAL PROPERTIES
MECHANICS
NUMERICAL SOLUTION
OIL SHALE PROCESSING PLANTS
580300* - Mineralogy
Petrology
& Rock Mechanics- (-1989)
040300 - Oil Shales & Tar Sands- Drilling
Fracturing & Mining