Details

Autor(en) / Beteiligte

• Dang, Wengang
• Wang, Chunpeng
• Huang, Linchong
• Tao, Kang
• Ma, Jianjun
• Liang, Yu
• Li, Xiang

Titel

A novel three-directional servo control dynamic loading apparatus for geomechanics

Ist Teil von

• Geomechanics and geophysics for geo-energy and geo-resources., 2022-12, Vol.8 (6), Article 209

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2022

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• 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 A novel three-directional servo-controlled dynamic loading apparatus was developed. The loading frame had three loading pistons, two in the horizontal direction and one in the vertical direction. The new device performed static/dynamic uniaxial compression, bi-directional compression, static/dynamic double shear, slide hold slide, velocity stepping tests, etc.