Progressive Weakening of Granite via Piezoelectric Excitation of Quartz with Alternating Current: Experimental Dataset

Summary:

This article shares experimental data evidencing alternating-current (AC) induced weakening of Kuru granite specimens. This work reports the mechanical data of dynamic and quasi-static Brazilian Disc (BD) tensile tests. The dynamic BD tensile tests were performed in Split Hopkinson Pressure Bars (SHPB). Additionally, X-Ray Phase Contrast Imaging (XPCI) was used to evidence the fragmentation of BD samples loaded dynamically, and the resulting images are presented in this work in the form of videos. The original data used to attain the fragmentation videos of the BD specimens is available at https://doi.esrf.fr/10.15151/ESRF-ES-962080191. The dataset reported in this Zenodo publication corresponds to the study conducted by Rubio Ruiz et al. (2024). 

Specimen Segmentation:

The granite specimens in this dataset are categorised into three distinct groups:

1. Treated-Wet: Specimens subjected to high-voltage alternating current (HV-AC) treatment with direct exposure to dielectric fluid.

2. Treated-Dry: Specimens subjected to HV-AC treatment without direct exposure to dielectric fluid.

3. Non-Treated-Dry: Specimens that have not undergone any treatment and have not been exposed to dielectric fluid.

Included data:

Quasi-static and Dynamic Brazilian Disc Test Results: The dataset consists of mechanical data obtained from dynamic and quasi-static Brazilian disc tests of each specimen type mentioned above. The data of the dynamic tests includes MATLAB figures (in .fig format), which display stress plotted against time. In addition, this dataset includes figures (in .fig format) depicting stress plotted against the dimensionless displacement parameter for both dynamic and quasi-static tests. This parameter is the ratio between the relative displacements of the loading bars and the specimen diameter.

Fragmentation Videos: This data set includes the XPCI-obtained videos capturing the fragmentation process of BD specimens in each specimen category.

References:

Rubio Ruiz RA, et al. (2024). Progressive weakening of granite by piezoelectric excitation of Quartz with alternating current. Rock Mechanics and Rock Engineering. https://doi.org/10.1007/s00603-024-03948-w

Funding: 

This research was funded by the Research Council of  Finland (grant number 340192) 

Acknowledgements:

The authors acknowledge the European Synchrotron Radiation Facility (ESRF) for providing beamtime access at ID 19 beamline (Proposal MI-1397, within the Shock BAG project supported by the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 870313, Streamline).