.... wellbore design hydraulic fracturing specimen size strength reservoir geomechanics size effect reservoir characterization upstream oil & gas equilibrium specimen bond strength incident bar stress rate rock specimen strain rate fakhimi particle model numerical result equation loading...

... and Lu, 2014; Lu et al., 2015). Upstream Oil & Gas Loading Rate prediction hydraulic fracturing experimental evidence breakage rock tensile strength testing zhurkov strength stress rate experiment tensile stress load test variability loading static fatigue constant load test...

...). best-fit line mode ii university kartchner cavern subcritical crack growth parameter fracture strength escabrosa limestone coconino sandstone hydraulic fracturing upstream oil & gas fracture toughness intercept stress rate specimen 1. INTRODUCTION Time-dependent rock failure...

... stress paths [18]. Park et al [18] derive a 3-D viscoelastic constitutive law for asphalt that includes the effects of damage. Reservoir Characterization creep strain function parameter strain data History representation uncemented reservoir sand Upstream Oil & Gas stress rate creep...

... Abstract In this paper, statistical aspects of the constant stress-rate test were investigated. The effects of the number of specimens on the subcritical crack growth parameters were examined. The grooved disk specimens were used to determine the fracture strength. 7 groups of fictitious data...

... ABSTRACT: Twenty seven triaxial compression tests have been conducted on welded tuff at constant and controlled axial piston displacement rates. The piston displacement rates were then converted to axial stress rates according to a nearly linear load-displacement relation. Specimens were...

..., structural and empirical models have been formulated from creep tests, strain and stress rate controlled tests, cyclic loading' tests and constant strain-rate triaxial tests. Uniaxial, triaxial and polyaxial borehole closure testing has been performed to assess the validity of each model. 1 INTRODUCTION...

...INFLUENCE OF STRESS RATE AND OTHER FACTORS ON STRENGTH AND ELASTIC PROPERTIES OF ROCKS By R. G. WuzRK iR *Department of Mining and Metallurgical Engineering, University of Illinois, Urbana, Illinois CONTENTS page Abstract 5 Effect orStress Rate 5 Effect ,o Combined Stresses and of Confinement 11...