Experiment p2394

Mechanical Data

See links below for mechanical data, Acoustic data and instructions for using them.

The .txt file contains the acquisition parameters and data such as: shear stress, normal stress, shear displacement, normal load displacement, etc.

p2394_data.txt (10 Mb) Mechanical Data in ASCII format after applying calibrations and removing offset. Cols are labeled


p2394_runsheet.pdf Run Sheet for this experiment


Acoustic Data

plotacousticdata.m MATLAB script to plot the acoustic data:


Acoustics files
p2394_exp10acfiles.tar (71 Gb) 4962 files


These .tdms files contain the raw continuous time series data. Acoustic data are recorded continuously at 40 kHz from an Accelerometer.
The ReadTDMS.txt file contains a few lines of code that will enable you to load/plot the acoustic data in Python.
For this experiment, large acoustic impulses were sent throughout the experiment from a large pizeoceramic disk (see Johson et al. 2008). The impulses can be found under the Acc variable in the mechanical data file. Similarly, these pulses are recorded on the accelerometer and can be seen when plotting the acoustic data.

ReadTDMS.txt MATLAB script to read acoustic files

---

Data from this experiment and a closely related experient (p2394) are report in this paper: Johnson, P. A., B. Ferdowsi, B. M. Kaproth, M. Scuderi, M. Griffa, J. Carmeliet, R. A. Guyer, P.-Y. Le Bas, D. T. Trugman, and C. Marone (2013), Acoustic emission and microslip precursors to stick-slip failure in sheared granular material, Geophys. Res. Lett., 40, doi:10.1002/2013GL057848.