.... Upstream Oil & Gas frictional Interferometry load frame preliminary experiment solid waste management experimental mechanics experiment Fixture procedure displacement diffraction specimen discontinuity fringe pattern interferometer lexan plate loading layered rock interface Rock...

... is needed for improved analysis of observed holographic fringe patterns. In short, the three dimensional displacement field at the surface of a stressed body produced by drilling of a "blind" (i.e. finite depth) hole cannot be simply defined by analytic means. Consequently, numerical methods must be used...

... (Shah 1990). The fracture mechanics of the interface is however, complicated, with many theoretical issues still unresolved. hydraulic fracturing crack extension specimen solid waste management crack length Upstream Oil & Gas fracture toughness fringe pattern limestone mechanics...

... in marble and oil shale. A point force induced displacement field is recorded with double expo- sure holography. Data consists of a fringe pat- tern on the viewed hologram. The elastic moduli are determined by modelling of the fringe pattern. Only Young's modulus is fairly constrained by the present data...

... environment. The wave fields reflected by the object in two slightly different configurations can be superimposed to form an interference fringe pattern. Thus, it is possible to measure the displacement that took place between the two configurations. This method is called holographic interferometry...

... are tensioned. The amount of this tensile stress is of course related to the amount of tension placed in the inclined anchor rods. Tensile stresses are produced in the fillet (point C) by tensioning the inclined anchor rods. RESULTS AND DISCUSSION Fringe Pattern Interpretation Figures 7 through 9 show...

... Rossmanith dally photoelastic study wave propagation dynamic interaction experiment application interaction attenuation excitation disturbance fringe pattern propagation H. P. Rossmanith The Role of Rayleigh Waves in Rock Mechanics Die Rolle der Rayleigh-wellen in der Felsmechanik La R le des...

... of the rock. Superimposed on the rock face are interferometric fringes that are related to the deformation of the surface at the time of the second laser exposure. Typical fringe patterns to be discussed later are illustrated in Fig. 3a through d. Holloway et al. (1972) has shown that the light intensity...

... - n) g STRESS DETERMINATIONS FROM THE SOFT INCLUSION From the photoelastic fringe pattern developed in the inclusion and using the equations given above, it is possible to determine the directions of the principal stresses, the principal stress ratio and the magnitude of the major principal stressL...

... hydraulic fracturing experiment Fracture Control charge holder dally ligamented split-tube charge fragmentation pattern borehole ligamented charge holder fringe pattern holder split-tube charge fracture plane control initiation site Plane Control fracture plane control University...

...). The second system employs the biaxial gauge applied by the stress-concentration technique at three points equally spaced at mid height around the periphery of the prop extension. In the second system, since the fringe pattern produced in each gauge has the four winged shape characteristic of a uniaxial...