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Title: Nonlinear elastodynamic behavior of intact and fractured rock under in-situ stress and saturation conditions

Journal Article · · Journal of the Mechanics and Physics of Solids

We probe mechanisms controlling the nonlinear elastodynamic response of intact and fractured rock under both fluid-saturated and dry conditions. We present the results of dynamic acoustoelastic testing (DAET) on Westerly granite in three states: dry-intact, dry-fractured and saturated-fractured to study the influence of in-situ stress, fracture and saturation state on nonlinear elastodynamic behavior. Each sample is tested at effective normal stresses from 10 to 20 MPa. Dynamic stresses of prescribed amplitudes (0.2 – 1.0 MPa) and frequencies (0.1, 1 and 10 Hz) are superimposed on the static stress field, while pulsed ultrasonic waves transit the sample and monitor stress-induced changes in wave velocity and spectral amplitude to infer sample's elastodynamic nonlinearity. Surprisingly, dry-intact rock exhibits higher nonlinearity than dry-fractured sample at all stress levels. We use numerical simulations to argue that the reduced nonlinearity is a result of the non-uniform strain field post fracture with highly strained regions on the fracture plane and weakly-strained regions in the surrounding host-rock, both leading to a nonlinearity reduction. In addition, we demonstrate that the saturated sample is less nonlinear than the dry intact except at 10 MPa normal stress, where the fracture is fairly open. The expected decrease in nonlinearity is due to increased fracture stiffness by the presence of fluid within the fracture interface. The reported in-situ measured nonlinear elastic properties along with their frequency dependencies will be of practical importance in predicting poromechanical properties of rock masses and will facilitate comparisons between the observations made in the laboratory and field scales.

Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0017585
OSTI ID:
1870384
Alternate ID(s):
OSTI ID: 1815063
Journal Information:
Journal of the Mechanics and Physics of Solids, Vol. 153; ISSN 0022-5096
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (55)

Fundamentals of rock joint deformation journal December 1983
Characterizing flow and transport in fractured geological media: A review journal August 2002
Postseismic Relaxation Along the San Andreas Fault at Parkfield from Continuous Seismological Observations journal September 2008
Mapping pressurized volcanic fluids from induced crustal seismic velocity drops journal July 2014
Fluid flow through rock joints: The effect of surface roughness journal January 1987
Flow rate dictates permeability enhancement during fluid pressure oscillations in laboratory experiments: Dynamic permeability enhancement journal April 2015
Seismic waves increase permeability journal June 2006
Laboratory observations of permeability enhancement by fluid pressure oscillation of in situ fractured rock journal January 2011
Field observations of seismic velocity changes caused by shaking-induced damage and healing due to mesoscopic nonlinearity journal January 2016
High-accuracy acoustic detection of nonclassical component of material nonlinearity journal November 2011
Memory, relaxation, and microfracturing in dilatant rock journal July 1981
The mechanical properties of materials with interconnected cracks and pores journal January 1996
An integrated analytical and experimental study of contact acoustic nonlinearity at rough interfaces of fatigue cracks journal February 2020
Dynamic acousto-elastic response of single fatigue cracks with different microstructural features: An experimental investigation journal August 2018
Slow dynamics and anomalous nonlinear fast dynamics in diverse solids journal January 2005
Inducing in situ, nonlinear soil response applying an active source journal January 2009
Dynamic measurements of the nonlinear elastic parameter α in rock under varying conditions: NONLINEAR ELASTIC PARAMETER IN ROCK journal February 2004
Modeling adhesive contacts under mixed-mode loading journal September 2019
From local to global measurements of nonclassical nonlinear elastic effects in geomaterials journal September 2016
Near-surface weakening in Japan after the 2011 Tohoku-Oki earthquake: NEAR-SURFACE WEAKENING IN JAPAN journal September 2011
Influence of macro-fractures and micro-fractures on permeability and elastic wave velocities in basalt at elevated pressure journal April 2011
Preseismic velocity changes observed from active source monitoring at the Parkfield SAFOD drill site journal July 2008
Nonequilibrium and nonlinear dynamics in Berea and Fontainebleau sandstones: Low-strain regime journal January 2007
Transmission of seismic waves across single natural fractures journal January 1990
Approaching a universal scaling relationship between fracture stiffness and fluid flow journal February 2016
Decoupling Nonclassical Nonlinear Behavior of Elastic Wave Types journal March 2016
Dynamic acoustoelastic testing of weakly pre-loaded unconsolidated water-saturated glass beads journal December 2010
Revealing highly complex elastic nonlinear (anelastic) behavior of Earth materials applying a new probe: Dynamic acoustoelastic testing: A NEW PROBE FOR ELASTICITY IN ROCKS journal June 2012
Anisotropy of dynamic acoustoelasticity in limestone, influence of conditioning, and comparison with nonlinear resonance spectroscopy journal June 2013
In situ characterization of shallow elastic nonlinear parameters with Dynamic Acoustoelastic Testing journal September 2014
Hysteretic nonlinear elasticity of Berea sandstone at low-vibrational strain revealed by dynamic acousto-elastic testing: LOW STRAIN HYSTERETIC ANELASTICITY journal February 2013
Nonlinear elastodynamics in micro-inhomogeneous solids observed by head-wave based dynamic acoustoelastic testing journal December 2011
Microstrain-level measurement of third-order elastic constants applying dynamic acousto-elastic testing journal October 2016
Harmonic generation at an unbonded interface—I. Planar interface between semi-infinite elastic media journal January 1979
Frequency, pressure, and strain dependence of nonlinear elasticity in Berea Sandstone journal April 2016
Dynamic Acousto-Elasticity in a Fatigue-Cracked Sample journal January 2014
A set of measures for the systematic classification of the nonlinear elastic behavior of disparate rocks: RIVIÈRE ET AL. journal March 2015
Evidence for Widespread Nonlinear Strong Ground Motion in the MW 6.9 Loma Prieta Earthquake journal October 2004
Shear-induced dilatancy of fluid-saturated faults: Experiment and theory journal January 2009
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Asperity generation and its relationship to seismicity on a planar fault: a laboratory simulation journal November 2016
Dynamic Stressing of Naturally Fractured Rocks: On the Relation Between Transient Changes in Permeability and Elastic Wave Velocity journal January 2020
Slow dynamics of consolidated granular systems: Multi-scale relaxation journal December 2017
Dynamic acousto-elastic testing of concrete with a coda-wave probe: comparison with standard linear and nonlinear ultrasonic techniques journal November 2017
CAN: an example of nonclassical acoustic nonlinearity in solids journal May 2002
Slow dynamics in the nonlinear elastic response of Berea sandstone journal October 1996
The effect of crack orientation on the nonlinear interaction of a P wave with an S wave : MODULATION OF journal June 2016
Universal Slow Dynamics in Granular Solids journal July 2000
Influence of water saturation on the nonlinear elastic mesoscopic response in Earth materials and the implications to the mechanism of nonlinearity journal January 2002
Multi-mode nonlinear resonance ultrasound spectroscopy for defect imaging: An analytical approach for the one-dimensional case journal July 2007
Nonlinear Elastic Wave Spectroscopy (NEWS) Techniques to Discern Material Damage, Part II: Single-Mode Nonlinear Resonance Acoustic Spectroscopy journal January 2000
Sudden drop of seismic velocity after the 2004 M w 6.6 mid-Niigata earthquake, Japan, observed with Passive Image Interferometry journal January 2009
Measurements of third‐order elastic constants in rocks journal September 1996
Nonlinear acoustoelastic constants of dry and saturated rocks: NONLINEAR ACOUSTOELASTIC CONSTANTS journal October 2004
Influence of change in physical state on elastic nonlinear response in rock: Significance of effective pressure and water saturation
  • Zinszner, Bernard; Johnson, Paul A.; Rasolofosaon, Patrick N. J.
  • Journal of Geophysical Research: Solid Earth, Vol. 102, Issue B4 https://doi.org/10.1029/96JB03225
journal April 1997