ESD5.2 - Direct Shear Device
Direct Shear Testing
The compact apparatus typ ESD5.2 is a laboratory tabletop device for performing direct shear tests according different standards such as ISO 17892-10. The shear axis is equipped with an electromechanical precision drive for speed-controlled experiments. The load / normal stress is generated electropneumatically (compressed air connection necessary!) by the tabletop-consolidation machine PLS5. The integration of the control electronics of the shear box and load frame in a tabletop housing made it possible to set up this space-saving shear device.
The shear cell is very robust and made of stainless steel entirely. The sample can be installed in a few simple steps. The lower shear frame is guided horizontally, the upper shear frame is guided vertically. The shear gap can be continuously adjusted from 0 mm to a maximum of 2 mm.
Characteristics:
- regulated electropneumatic drive for normal stress generation
- regulated electromechanical drive for generating the horizontal shear stress with integrated shear path measurement
- high speed multi-core-system with bus coupling, each drive unit (horizontal and vertical drive) using it's own high resolution closed-loop controller with 1 ms sampling time
- robust construction, all water or soil-contacting parts are made of stainless steel, including the filter stones
- very compact design with a high stiffness frame
- horizontal low-friction guided lower shear frame and vertical low-friction guided upper shear frame
- shear test with constant volume (free of dilatancy) possible
- stepless adjustment (between 0 and 2 mm) and fixation of the shear gap after consolidation process
- serial interface for PC-controlled testing with data logging using a standard-PC with the software GeoDESC
available Accessories:
- shear frames: Ø 71,4 mm; Ø 56,4 mm; □ 60 x 60 mm
- laboratory compressor
- compressed air regulator with filter
- oedometer cells for consolidation tests
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