Abstract
To more accurately determine the mechanical behavior of geomaterials exposed to different stress conditions, we developed a novel three-directional servo-controlled loading apparatus, the “DWZ-250”, which could apply static or dynamic loads in the two horizontal and one vertical directions. DWZ-250 system consisted of a loading frame, a servo-controlled system, and a PC console. The loading frame had three loading pistons, two in the horizontal direction and one in the vertical direction. The servo-controlled system had static and dynamic modules that supplied either static or dynamic forces of up to 250 kN or a positive or negative velocity for each piston of up to 50 mm/min. The forces were recorded by load cells, and the displacements were recorded by linear variable differential transformers (LVDTs). The PC console consisted of a terminal controller, which included an advanced bespoke control software package “Dex.MulTest.2020”, which performed all operations and met data storage requirements. The DWZ-250 system performed static/dynamic uniaxial compression, bi-directional compression, static/dynamic double shear, slide hold slide, velocity stepping tests, etc. This new system did not have the limitations of existing devices and provided new strategies for performing a geomechanical investigation.
Article Highlights
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A novel three-directional servo-controlled dynamic loading apparatus was developed.
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The loading frame had three loading pistons, two in the horizontal direction and one in the vertical direction.
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The new device performed static/dynamic uniaxial compression, bi-directional compression, static/dynamic double shear, slide hold slide, velocity stepping tests, etc.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51904359, 51978677, 52111530089), the Guangdong Provincial Department of Science and Technology (Grant No. 2019ZT08G090), Natural Science Foundation of Guangdong Province of China (2020A151501528), Enhanced National Key Basic Research Program (2019-JCJQ-ZD-352-00-04), Science and Technology Program for Sustainable Development of Shenzhen (KCXFZ202002011008532, KCXFZ20201221173207020), and the Fundamental Research Funds for the Central Universities (22dfx06). The technical supports from Mr. Xinfan Chen and Mr. Junpeng Chen are highly appreciated.
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WD: Funding acquisition, Project administration, Conceptualization, Writing–review & editing, Supervision. CW: Conceptualization, Data curation, Methodology, Writing–original draft. Linchong Huang: Funding acquisition, Project administration. KT: Investigation, Data curation, Writing–review & editing. JM: Writing–review & editing. YL: Writing–review & editing. XL: Writing–review & editing.
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Dang, W., Wang, C., Huang, L. et al. A novel three-directional servo control dynamic loading apparatus for geomechanics. Geomech. Geophys. Geo-energ. Geo-resour. 8, 209 (2022). https://doi.org/10.1007/s40948-022-00511-1
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DOI: https://doi.org/10.1007/s40948-022-00511-1