Description
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.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| DCIF Block C Thermocouple Measurement Data.TXT | Text | Thermocouple temperature measurement data for block C. See the attached meta file for the explanation of the contents | Open resource |
| DCIF Block D Thermocouple Measurement Data.TXT | Text | Thermocouple temperature measurement data for block D. See the attached meta file for the explanation of the contents | Open resource |
| DCIF Block E Thermocouple Measurement Data.TXT | Text | Thermocouple temperature measurement data for block E. See the attached meta file for the explanation of the contents | Open resource |
| DCIF Block F Thermocouple Measurement Data.TXT | Text | Thermocouple temperature measurement data for block F. See the attached meta file for the explanation of the contents | Open resource |
| DCIF Acoustic Emission Location Block C.TXT | Text | Acoustic emission location data for block C. See the attached meta file for the explanation of the contents | Open resource |
| DCIF Acoustic Emission Location Block D.TXT | Text | Acoustic emission location data for block D See the attached meta file for the explanation of the contents | Open resource |
| DCIF Acoustic Emission Location Block E.TXT | Text | Acoustic emission location data for block E. See the attached meta file for the explanation of the contents | Open resource |
| DCIF Acoustic Emission Location Block F.TXT | Text | Acoustic emission location data for block F. See the attached meta file for the explanation of the contents. | Open resource |
| DCIF Stress Test Westerly Granite Metadata.docx | Doc | This document lists the uploaded data file names, explanations for each column of the data tables, and schematic diagrams for the experimental setup and the sensor locations. | Open resource |
| DCIF Time vs AE Rate Summary.tif | TIFF | This image shows experimental time vs measured AE generation rate for samples subjected to different confining stresses. | Open resource |
| DCIF Time vs Cumulative AE Count Summary.tif | TIFF | This image shows temperature measured on the cooling cup containing liquid nitrogen vs measured, cumulative total AE events for samples subjected to different confining stresses. | Open resource |
| DCIF Westerly Granite Block C AE Movie.avi | Unknown | This animation shows locations of the AE events produced within a sample block C, during the local cooling experiment. | Open resource |
| DCIF Westerly Granite Block D AE Movie.avi | Unknown | This animation shows locations of the AE events produced within a sample block D, during the local cooling experiment. | Open resource |
| DCIF Westerly Granite Block E AE Movie.avi | Unknown | This animation shows locations of the AE events produced within a sample block E, during the local cooling experiment. | Open resource |
| DCIF Westerly Granite Block F AE Movie.avi | Unknown | This animation shows locations of the AE events produced within a sample block F, during the local cooling experiment. | Open resource |