The effect of friction on simulated dynamic fracturing of rocks

Conference · Wed May 01 00:00:00 EDT 1991

OSTI ID:5600760

Attia, A V

During underground nuclear tests, rocks may fail by plastic yielding, which limits shear strength, or by tensile fracture, wherever maximum principal stress exceeds tensile strength. A third mode of failure exists due to friction along closed fractured surfaces. There, friction affects slipping and can thus limit stress. In this paper, we study the effect of friction on the simulated dynamic response of rocks to underground nuclear explosions. The coefficient of friction is the ratio of total shear stress applied to a closed fracture surface to normal applied compressive total stress. At low coefficients of friction, the evolving stress field tends to be weakened by frictional slip, which also eases closing of fractures. At high coefficients of friction, the stress field tends to be strengthened, where fractures have closed, but remains weak, where fractures are left open. 4 refs., 4 figs.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5600760
• Report Number(s): UCRL-JC-107275; CONF-911069-8; ON: DE91017095
• Resource Relation: Conference: 3. international conference on mechanical and physical behavior of materials under dynamic loading, Strasbourg (France), 14-18 Oct 1991
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
58 GEOSCIENCES
36 MATERIALS SCIENCE
ROCKS
FRACTURE MECHANICS
FRACTURE PROPERTIES
FRICTION
CONTAINED EXPLOSIONS
K CODES
NUCLEAR EXPLOSIONS
PLASTICITY
SHEAR
UNDERGROUND EXPLOSIONS
COMPUTER CODES
EXPLOSIONS
MECHANICAL PROPERTIES
MECHANICS
450200* - Military Technology
Weaponry
& National Defense- Nuclear Explosions & Explosives
580000 - Geosciences
360603 - Materials- Properties