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).摘要： 本文公开了用于验证交流电（alternating current，AC）诱导库鲁花岗岩试样弱化效应的实验数据。本研究报道了动态与准静态巴西圆盘（Brazilian Disc，BD）拉伸试验的力学数据。动态BD拉伸试验在分离式霍普金森压杆（Split Hopkinson Pressure Bars，SHPB）上完成。此外，本研究采用X射线相位衬度成像（X-Ray Phase Contrast Imaging，XPCI）验证动态加载BD试样的断裂过程，所得结果以视频形式呈现于本文中。用于获取BD试样断裂视频的原始数据可通过https://doi.esrf.fr/10.15151/ESRF-ES-962080191获取。本Zenodo平台发布的数据集对应Rubio Ruiz等人（2024）开展的研究工作。 试样分组： 本数据集内的花岗岩试样分为三个独立组别： 1. 湿处理组：经高压交流电（high-voltage alternating current，HV-AC）处理且直接接触绝缘流体的试样。 2. 干处理组：经HV-AC处理但未直接接触绝缘流体的试样。 3. 未处理干样组：未经过任何处理且未接触绝缘流体的试样。 包含数据： 准静态与动态巴西圆盘试验结果：本数据集包含上述所有试样类型的动态与准静态巴西圆盘试验所得力学数据。动态试验数据包含以.fig格式保存的MATLAB绘图，用于展示应力随时间的变化关系。此外，本数据集还包含以.fig格式保存的绘图，分别展示动态与准静态试验中应力与无量纲位移参数的对应关系，该参数为加载杆相对位移与试样直径的比值。 断裂过程视频：本数据集包含采用XPCI获取的、各分组BD试样的断裂过程视频。 参考文献： Rubio Ruiz RA 等人（2024）. 利用交流电激发石英压电效应实现花岗岩渐进弱化[J]. 岩石力学与岩石工程. https://doi.org/10.1007/s00603-024-03948-w 资助情况： 本研究由芬兰研究理事会资助（项目编号：340192） 致谢： 作者感谢欧洲同步辐射光源（European Synchrotron Radiation Facility，ESRF）提供ID19光束线的束流时间（项目编号MI-1397，该项目属于欧盟“地平线2020”研究与创新计划下的Shock BAG项目，资助协议号：870313，Streamline）。