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

Conference · Fri Mar 01 00:00:00 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
• 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

Related Subjects

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