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| A Boundary Element Method Code in 2-D using Matlab for Fracture and Fault Modeling
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Personnel: David D. Pollard, Gaurav Chopra, Kurt Sternlof |
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Sponsor: Stanford Rock Fracture Project
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Description:
BEM2D is a computer program written by Gaurav Chopra in MATLAB® which models the quasi-static linear elastic deformation of
an infinite medium in two dimensions. The code is designed to model the behavior of fractures and faults in nature. Each
fracture/fault is referred to as a "structure" in the code and these structures are composed of many different linear
"elements". The normal and shear stiffnesses of elements or the displacement discontinuities across elements may be specified as
boundary conditions (inputs given by the user). The medium surrounding the elements is postulated to be homogenous, isotropic
and linear with respect to elastic properties while the elements can possess non-linear stress displacement relations. The user
may define any geometry of the structures (resolved as straight segments) and there may be any number of structures which
contain any number of elements. The external loading is specified as a uniform stress state. The structures are allowed to
propagate according to a criterion, provided by the user. The stress state at any point in the elastic whole space results from
the superposed contributions of every element, as well as the remotely applied stress state. The simulation results from the
code may be compared to field observations and changes in the propagation criterion or changes in the element stiffness made to
find better agreement.
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