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

Dataset · Thu Jul 08 04:00:00 EDT 2021

DOI:https://doi.org/10.15121/1829305· OSTI ID:1829305

Nakagawa, Seiji ^[1]; Trzeciak, Maciej

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1. Lawrence Berkeley National Laboratory

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.

• Research Organization: DOE Geothermal Data Repository; Lawrence Berkeley National Laboratory
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Program (EE-4G)
• Contributing Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: EE0009033
• OSTI ID: 1829305
• Report Number(s): 1343
• Availability: [e-mail]
• Country of Publication: United States
• Language: English

Related Subjects

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