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Chemical effects on subcritical fracture in silica from molecular dynamics simulations

Journal Article · · Journal of Geophysical Research. Solid Earth
DOI:https://doi.org/10.1029/2018JB016120· OSTI ID:1474087
 [1];  [2];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Geochemistry Dept.
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Mechanics of Materials Dept.

Fracture toughness of silicates is reduced in aqueous environments due to water-silica interactions at the crack tip. In this paper, to investigate this effect, classical molecular dynamics (MD) simulations using the bond-order based reactive force field (ReaxFF) were used to simulate silica fracture. The chemical and mechanical aspects were separated by simulating fracture in: (a) vacuum with dynamic loading, (b) an aqueous environment with dynamic loading, and (c) an aqueous environment with static subcritical mechanical loading to track silica dissolution. The addition of water to silica fracture reduced the silica fracture toughness by ~25%, a trend consistent with experimentally reported results. Analysis of Si-O bonds in the process zone and calculations of dissipation energy associated with fracture indicated that water relaxes the entire process zone, and not just the surface. Additionally, the crack tip sharpens during fracture in water and an increased number of microscopic propagation events occur. This results in earlier fracture in systems with increasing mechanical loading in aqueous conditions, despite the lack of significant silica dissolution. Finally and therefore, the threshold for Si-O bond breakage has been lowered in the presence of water and the reduction in fracture toughness is due to structural and energetic changes in the silica, rather than specific dissolution events.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); SNL Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
NA0003525
OSTI ID:
1474087
Alternate ID(s):
OSTI ID: 1480904
Report Number(s):
SAND--2018-10275J; 668010
Journal Information:
Journal of Geophysical Research. Solid Earth, Journal Name: Journal of Geophysical Research. Solid Earth Journal Issue: 11 Vol. 123; ISSN 2169-9313
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

References (77)

The effect of fluid composition, salinity, and acidity on subcritical crack growth in calcite crystals: SUBCRITICAL CRACK IN CALCITE journal March 2016
The fracture of particulate-filled epoxide resins: Part 1 journal January 1983
Subcritical crack growth, surface energy, fracture toughness, stick-slip and embrittlement journal September 1985
Effects of water and other dielectrics on crack growth journal December 1982
Indentation fracture: principles and applications journal June 1975
A fracture mechanics study of subcritical tensile cracking of quartz in wet environments journal January 1979
The fracture of particulate-filled epoxide resins journal April 1984
Nanoscale damage during fracture in silica glass journal July 2006
Model of effect of environmental attack on flaw growth kinetics of glass journal April 2007
Fracture criterion for conductive cracks in soda-lime glass under combined mechanical and electrical loading journal March 2010
Molecular dynamics simulations of the structure and mechanical properties of silica glass using ReaxFF journal July 2016
Role of the pore fluid in crack propagation in glass journal February 2015
The Use of Atomic Force Microscopy to Study Crack Tips in Glass journal December 2010
Water Penetration—Its Effect on the Strength and Toughness of Silica Glass journal September 2012
Low-temperature opal-CT precipitation in Antarctic deep-sea sediments: evidence from oxygen isotopes journal December 1991
Controls on silicate dissolution rates in neutral and basic pH solutions at 25°C journal November 1989
High strain rate effects on the structure of a simulated silica glass journal October 1985
Molecular dynamics studies of brittle failure in silica: bond fracture journal September 1991
Fracture mechanics parameters of some rock-forming minerals determined using an indentation technique journal December 1980
Subcritical crack propagation in rocks: theory, experimental results and applications journal January 1982
Water diffusion and surface structural relaxation of silica glasses journal August 2001
Anomalous temperature dependence of sub-critical crack growth in silica glass journal February 2003
Surface and bulk structural relaxation kinetics of silica glass journal February 1997
Nanoscale and effective mechanical behavior and fracture of silica nanocomposites journal December 2008
The effect of water penetration on crack growth in silica glass journal March 2013
Nano-ductile crack propagation in glasses under stress corrosion: spatiotemporal evolution of damage in the vicinity of the crack tip journal January 2005
A unified study of crack propagation in amorphous silica: Using experiments and simulations journal May 2007
A material frame approach for evaluating continuum variables in atomistic simulations journal March 2010
The construction and application of an atomistic J-integral via Hardy estimates of continuum fields journal September 2010
Molecular dynamics studies of brittle fracture in vitreous silica: Review and recent progress journal June 2005
Stress-enhanced ion diffusion at the vicinity of a crack tip as evidenced by atomic force microscopy in silicate glasses journal January 2007
Fracture toughness of calcium–silicate–hydrate from molecular dynamics simulations journal July 2015
Revisiting silica with ReaxFF: Towards improved predictions of glass structure and properties via reactive molecular dynamics journal July 2016
Time-dependent cracking and brittle creep in crustal rocks: A review journal July 2013
Parallel reactive molecular dynamics: Numerical methods and algorithmic techniques journal April 2012
Fracture of Brittle Solids book January 2010
ReaxFF Molecular Dynamics Simulations of Hydroxylation Kinetics for Amorphous and Nano-Silica Structure, and Its Relations with Atomic Strain Energy journal December 2015
Water Interactions with Nanoporous Silica: Comparison of ReaxFF and ab Initio based Molecular Dynamics Simulations journal October 2016
Surface Structure and Stability of Partially Hydroxylated Silica Surfaces journal April 2017
Ab Initio Study of the Hydroxylated Surface of Amorphous Silica: A Representative Model journal May 2008
ReaxFF SiO Reactive Force Field for Silicon and Silicon Oxide Systems journal May 2003
Dissociative Water Potential for Molecular Dynamics Simulations journal August 2007
Dissociative Chemisorption of Water onto Silica Surfaces and Formation of Hydronium Ions journal February 2008
Dissociative Chemisorption of Water onto Silica Surfaces and Formation of Hydronium Ions journal May 2009
Failure mode and weakening effect of water on sandstone journal July 2000
Geochemical controls on the kinetics of quartz fracture at subcritical tensile stresses journal November 1995
Subcritical crack growth in geological materials journal June 1984
A molecular interpretation of stress corrosion in silica journal February 1982
Material flux and porosity changes during sediment diagenesis journal March 1992
Intrinsic toughening and stable crack propagation in hexagonal boron nitride journal June 2021
How to build a better pair potential for water journal April 2001
The Statistical Mechanical Theory of Transport Processes. IV. The Equations of Hydrodynamics journal June 1950
A quantum mechanical study of the reactivity of (SiO)2-defective silica surfaces journal May 2008
A reactive molecular dynamics simulation of the silica-water interface journal May 2010
Visualization and analysis of atomistic simulation data with OVITO–the Open Visualization Tool journal December 2009
The Phenomena of Rupture and Flow in Solids journal January 1921
Evidence of Deep Water Penetration in Silica during Stress Corrosion Fracture journal April 2011
Glass Breaks like Metal, but at the Nanometer Scale journal February 2003
Fracture of Silicate Glasses: Ductile or Brittle? journal May 2004
The structure of vitreous silica journal October 1969
First-Principles Study of Hydrolysis Reaction Barriers in a Sodium Borosilicate Glass journal November 2013
Glass Science in the United States: Current Status and Future Directions journal January 2014
Fracture Surface Energy of Glass journal February 1969
A Molecular Mechanism for Stress Corrosion in Vitreous Silica journal April 1983
Direct Observation of Crack Tip Geometry of SiO2 Glass by High-Resolution Electron Microscopy journal March 1984
Water Entry into Silica Glass During Slow Crack Growth journal October 1991
Crack-Tip Structure in Soda-Lime-Silicate Glass journal March 2005
Molecular Dynamics Simulation of the Structure and Hydroxylation of Silica Glass Surfaces journal September 2005
Effect of Water on the Inert Strength of Silica Glass: Role of Water Penetration journal November 2012
Ab initio Molecular Dynamics Simulations of the Hydroxylation of Nanoporous Silica journal August 2015
Surface structures of sodium borosilicate glasses from molecular dynamics simulations journal March 2017
Crack propagation in silica from reactive classical molecular dynamics simulations journal November 2017
Atomistic Aspects of Crack Propagation in Brittle Materials: Multimillion Atom Molecular Dynamics Simulations journal August 2002
Ostwald processes and mineral paragenesis in sediments journal June 1988
Grand Challenges in Glass Science journal October 2014
Glass breaks like metals, but at the nanometer scale text January 2002
Nanoscale damage during fracture in silica glass text January 2006

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