DCIF Westerly Granite AE Stress Effect Test (Task 3-1)

Nakagawa, Seiji; Trzeciak, Maciej

doi:10.15121/1829305

Title: DCIF Westerly Granite AE Stress Effect Test (Task 3-1)

Dataset
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Abstract

Directional Cooling-Induced Fracturing (DCIF) experiments were conducted on rectangular Westerly granite blocks (width=depth=4.0", height=2.0"). Liquid nitrogen was poured in a small, 1"-diameter copper cup attached to the top of the sample, and the resulting acoustic emissions (AEs) and temperature changes on the surface of the sample were monitored. Several confining stresses were applied bi-axially to the sides of the samples so that the onset of AE activity and the stress applied to the sample were correlated. The obtained AEs were used to determine the microcracking source locations and amplitude, and the associated moment tensors. Included in this submission are the animations of the AE locations and graphics displaying the measured temperature-AE activity changes for different stresses.

Authors:

Nakagawa, Seiji; Trzeciak, Maciej

Lawrence Berkeley National Laboratory

Publication Date:: Thu Jul 08 04:00:00 UTC 2021

Other Number(s):: 1343

DOE Contract Number:: EE0009033

Research Org.:: DOE Geothermal Data Repository; Lawrence Berkeley National Laboratory

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Program (EE-4G)

Collaborations:: Lawrence Berkeley National Laboratory

Subject:: 15 GEOTHERMAL ENERGY; Westerly Granite; acoustic emission; acoustic emission location; acoustic emission rate; data; energy; fracture; fracturing; geophysics; geothermal; granite; microfracture; processed data; stress; stress measurement; stress testing; temperature; thermal fracturing

OSTI Identifier:: 1829305

DOI:: https://doi.org/10.15121/1829305

Citation Formats


                    Nakagawa, Seiji, and Trzeciak, Maciej. DCIF Westerly Granite AE Stress Effect Test (Task 3-1).  United States: N. p., 2021. 
        Web.  doi:10.15121/1829305.

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                    Nakagawa, Seiji, & Trzeciak, Maciej. DCIF Westerly Granite AE Stress Effect Test (Task 3-1).  United States.  doi:https://doi.org/10.15121/1829305

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                    Nakagawa, Seiji, and Trzeciak, Maciej. 2021.  
"DCIF Westerly Granite AE Stress Effect Test (Task 3-1)".  United States.  doi:https://doi.org/10.15121/1829305.  https://www.osti.gov/servlets/purl/1829305. Pub date:Thu Jul 08 04:00:00 UTC 2021

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@article{osti_1829305,

  title        = {DCIF Westerly Granite AE Stress Effect Test (Task 3-1)},

  author       = {Nakagawa, Seiji and Trzeciak, Maciej},

  abstractNote = {Directional Cooling-Induced Fracturing (DCIF) experiments were conducted on rectangular Westerly granite blocks (width=depth=4.0", height=2.0"). Liquid nitrogen was poured in a small, 1"-diameter copper cup attached to the top of the sample, and the resulting acoustic emissions (AEs) and temperature changes on the surface of the sample were monitored. Several confining stresses were applied bi-axially to the sides of the samples so that the onset of AE activity and the stress applied to the sample were correlated. The obtained AEs were used to determine the microcracking source locations and amplitude, and the associated moment tensors. Included in this submission are the animations of the AE locations and graphics displaying the measured temperature-AE activity changes for different stresses.},

  doi          = {10.15121/1829305},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Jul 08 04:00:00 UTC 2021},

  month        = {Thu Jul 08 04:00:00 UTC 2021}

}

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DOI: https://doi.org/10.15121/1829305

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