Modeling dynamic fracture in granite under in situ conditions at high temperatures and pressures

Vorobiev, Oleg Y.; Morris, Joseph P.

doi:10.1016/j.ijrmms.2018.11.007

Title: Modeling dynamic fracture in granite under in situ conditions at high temperatures and pressures

Abstract

Reproducing the in situ mechanical response of granite at a depth of a few kilometer under dynamic loading presents significant challenges. We have developed and calibrated a new thermo-mechanical model for granite using extensive experimental data from both quasi-static and dynamic test data. The model includes parameters which can be calibrated for a specific geologic setting. Using the model developed we have performed a series of 2D and 3D simulations to evaluate effects of in situ stress and temperature on the extent of damage surrounding underground explosions. We compare our results with available data for cavity size, plastic zone and peak velocity attenuation with range in granite.

Authors:

Vorobiev, Oleg Y. ^[1]; Morris, Joseph P. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Tue Dec 18 00:00:00 EST 2018

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1642510

Alternate Identifier(s):: OSTI ID: 1637065

Report Number(s):: LLNL-JRNL-799074
Journal ID: ISSN 1365-1609; 961211

Grant/Contract Number:: AC52-07NA27344; 15-ERD-010

Resource Type:: Accepted Manuscript

Journal Name:: International Journal of Rock Mechanics and Mining Sciences

Additional Journal Information:: Journal Volume: 113; Journal Issue: na; Journal ID: ISSN 1365-1609

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES; Dynamic fracture; Strength; Thermo-mechanical model of granite

Citation Formats


                    Vorobiev, Oleg Y., and Morris, Joseph P. Modeling dynamic fracture in granite under in situ conditions at high temperatures and pressures.  United States: N. p., 2018. 
Web.  doi:10.1016/j.ijrmms.2018.11.007.

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                    Vorobiev, Oleg Y., & Morris, Joseph P. Modeling dynamic fracture in granite under in situ conditions at high temperatures and pressures.  United States.  https://doi.org/10.1016/j.ijrmms.2018.11.007

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                    Vorobiev, Oleg Y., and Morris, Joseph P. Tue .  
"Modeling dynamic fracture in granite under in situ conditions at high temperatures and pressures".  United States.  https://doi.org/10.1016/j.ijrmms.2018.11.007.  https://www.osti.gov/servlets/purl/1642510.

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@article{osti_1642510,

  title        = {Modeling dynamic fracture in granite under in situ conditions at high temperatures and pressures},

  author       = {Vorobiev, Oleg Y. and Morris, Joseph P.},

  abstractNote = {Reproducing the in situ mechanical response of granite at a depth of a few kilometer under dynamic loading presents significant challenges. We have developed and calibrated a new thermo-mechanical model for granite using extensive experimental data from both quasi-static and dynamic test data. The model includes parameters which can be calibrated for a specific geologic setting. Using the model developed we have performed a series of 2D and 3D simulations to evaluate effects of in situ stress and temperature on the extent of damage surrounding underground explosions. We compare our results with available data for cavity size, plastic zone and peak velocity attenuation with range in granite.},

  doi          = {10.1016/j.ijrmms.2018.11.007},

  journal      = {International Journal of Rock Mechanics and Mining Sciences},

  number       = na,

  volume       = 113,

  place        = {United States},

  year         = {Tue Dec 18 00:00:00 EST 2018},

  month        = {Tue Dec 18 00:00:00 EST 2018}

}

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https://doi.org/10.1016/j.ijrmms.2018.11.007

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Cited by: 13 works

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Figures / Tables:

Figure 1: Comparison of calculated strain-rate enhancement factor with experimental data. Squares - experimental data from <48>, circles- experimental data for uniaxial compression of cold Westerley granite at various rates from <44>, lines- calculations using Eq. (40)

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