The surrounding rock stability of an underground cavern group is important issue in the process excavation, which has characteristics large displacement, discontinuity and uneven deformation, so calculation analysis are very complicated. optimized discontinuous deformation for failure method was adopted to analyze a real engineering under different excavation schemes. cracking schemes, depth cr...

The thermoelectroelastic GreenÕs functions are presented for an in®nite piezoelectric plate with an elliptic inclusion of dissimilar material induced by a thermal load located inside or on the boundary of the elliptic inclusion. The load may be a point heat source and the thermal analog of a line dislocation with temperature discontinuity. The derivation is based on the Stroh formalism, conform...

Poro-thermo-mechanical processes and mineral precipitation/dissolution change the fracture aperture and thus affect the fluid flow pattern in the fracture. In this paper, we study this phenomenon by further development and application of a three-dimensional thermo-poro-mechanical model to include silica dissolution-precipitation effects. The solid mechanics aspect of the problem is treated usin...

A symmetric-Galerkin boundary element framework for fracture analysis with frictional contact (crack friction) on the crack surfaces is presented. The algorithm employs a continuous interpolation on the crack surface (utilizing quadratic boundary elements) and enables the determination of two important quantities for the problem, namely the local normal tractions and sliding displacements on th...

Interfaces in elastic media need not be in welded contact. For instance, fractures allow a small amount of slip to occur along their surfaces during the passage of a seismic wave. By slip, we mean that the displacement across the interface can be discontinuous. Reflection and transmission of plane waves in this case are frequency dependent. Previous numerical studies have chosen the finite-diff...

The formulation for thermal stress and electric displacement in an in®nite thermopiezoelectric plate with an interface and multiple cracks is presented. Using Green's function approach and the principle of superposition, a system of singular integral equations for the unknown temperature discontinuity de®ned on each crack face is developed and solved numerically. The formulation can then be use...

This paper deals with the handling of deformable linear objects (DLOs), such as hoses, wires or leaf springs, bases on force/torque sensing. First, we describe the characteristic change of force and moment for all single-contact transitions which may occur between DLO and a rigid polyhedron obstacle. Second, we present data processing algorithms for the automated detection of state transitions ...

Considering the incomplete contact between adjacent layers of crossanisotropic multilayered half-space media, an algorithm was derived based on spectral element method (SEM) to determine dynamic response at any point medium when axisymmetric harmonic load is applied. The used two equivalent parameters simulate relationship discontinuity displacement and stress. SEM employed for summation in int...

The calibration method is used to identify some minimizers of the Mumford-Shah functional. The method is then extended to more general free discontinuity problems.

Deformation pattern of the northeastern part of the Iranian-Arabian collision zone (i.e., mainly Sanandaj-Sirjan Belt or Zone) is the main concern of this paper. Here, we investigate the stress distribution and displacement pattern of Eghlid-Deh Bid area as affected by the position of Zagros suture using a three dimensional mechanical model. The modeled area is located between the Zagros Thrust...