Digital Direct Shear Apparatus

This unit is similar to HS 24.620 except that it can accommodate sample size of 300*300*150 mm.
Servomotor can create power to give a shearing load of 50kN. Additional Stepper motor is provided for
normal stress. This stepper motor can create a maximum stess of 5kg/sqcm. Total control is through the
computer. Parameters like shearing load, vertical strain and horizontal strains are shown on the monitor.
Operation is based on the close loop Principle the
the specimen to be sheared can be loaded either on the strain
basis or stress basis.
The selection of this mode has to be made at the beginning
of the test. The maximum strain rate that can be achieved
is 9.9999mm/min whereas the minimum strain rate
could be programmed as low as 0.0001mm/min.
Loading System
For Horizontal strain-controlled through the micro stepper
motor:
i) Rate of strain : 0.0001-9.9999mm/min.
ii) Load range capacity: ± 50kN
iii) Displacement range: ±50mm

For Vertical Consolidation:
i) Capacity : 5kg/cm2
ii) Range : 0-20 mm Electronic Sensors
i) Load cell Universal type : 50kN
ii) Displacement sensor horizontal : ±50mm
iii) Displacement sensor vertical : ±50mm

Salient Features of software and graphical plots
i) It is supported by user-friendly windows based software for graphical plotting and numerical tabulations.
ii) Horizontal displacement vs. Vertical displacement
iii) Normal stress vs. Shear stress
iv) Displays the maximum value of dilation angle along with c and ø values.