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Visco‐plastic behaviour during the excavation phase of a salt cavity
Author(s) -
Fossum Arlo F.
Publication year - 1977
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1610010105
Subject(s) - creep , excavation , finite element method , geotechnical engineering , stress field , stress (linguistics) , mechanics , salt dome , phase (matter) , field (mathematics) , geology , homogeneous , materials science , engineering , structural engineering , thermodynamics , physics , mathematics , composite material , paleontology , linguistics , philosophy , quantum mechanics , pure mathematics
The stress field and flow characteristics are studied for a cavity with the shape of a prolate spheroid in dome salt with emphasis given to the excavation phase. A semi‐empirical creep law is derived from thermodynamic principles and experimental results. In this paper, an elementary non‐linear form is used in the kinetic relation. A finite element solution procedure is discussed which incorporates the creep law, excavation sequence, and arbitrary non‐homogeneous initial stress field.