Multiphase continuum model to describe dynamic loading effects in nonlinear porous media

Conference · Fri Mar 01 04:00:00 EST 1985

OSTI ID:5694041

Swift, R P; Burton, D E; Bryan, J B; Glenn, H D

A multiphase constitutive model that couples nonlinear deformation to porous flow has been developed for numerical analyses of dynamic behavior of geological media. The model has been incorporated into the explicit finite-difference code TENSOR and applied to examine the phenomenology associated with contained explosions and nuclear surface cratering in a coral geology. For contained explosions in nearly saturated media, the model predicts a region of liquefaction to exist adjacent to the cavity. This region is markedly enhanced for the case of total saturation and the associated pore pressure buildup indicate that the stability of the residual stress field may be threatened. Based on plausible assumptions about the geology and the constitutive relations of coral, we have shown that the multiphase constitutive model can relate subsidence to calculational parameters such as peak effective stress. Most of the observed volume of the Koa crater at the Pacific Proving Grounds can be accounted for by late time consolidation of the damaged coral. 21 refs., 10 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5694041
• Report Number(s): UCRL-92355; CONF-850614-5; ON: DE85010102
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450202 -- Explosions & Explosives-- Nuclear-- Weaponry-- (-1989)
58 GEOSCIENCES
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
BLAST EFFECTS
CAVITIES
CNIDARIA
COMPUTERIZED SIMULATION
CORALS
CRATERS
DATA
EQUATIONS
EXPERIMENTAL DATA
EXPLOSIONS
FINITE DIFFERENCE METHOD
FORECASTING
GEOLOGY
INFORMATION
ITERATIVE METHODS
MATERIALS
MATHEMATICAL MODELS
NUCLEAR EXPLOSIONS
NUMERICAL DATA
NUMERICAL SOLUTION
PORE PRESSURE
POROSITY
POROUS MATERIALS
PREDICTION EQUATIONS
SHOCK WAVES
SIMULATION
STRESSES
THEORETICAL DATA
UNDERGROUND EXPLOSIONS