Shear Stage Setup
The Shear Stage initially consists of an engage stage whereby the load cell is docked onto the specimen at a specified rate before proceeding with a number of predefined stress stages (Lines).
Each stress stage Line can be set up with your defined Initial Conditions, data logging requirements and Stop Conditions. Lines can be added and deleted using the ‘Add’ and ‘Delete’ buttons.
The Cell Pressure is used to adjust the Mean Net Stress to the required value whilst the Load frame or Hydraulic Ram provides the Deviator Stress control. Values are entered for the final Net Stress and Deviator Stress along with the time in which to achieve them. During this phase, the suction is maintained at the required value by adjusting the Pore water pressure. readings.
You can specify data logging to be at a predefined rate or using a table (such as Square Root of Time or Logarithmic Time).
Each Stress Stage Line is terminated when either the specified Net Stress, Suction Pressure and Deviator Stress Levels are reached, the Axial Strain extends beyond a specified percentage or a maximum time has been exceeded.
Once all the Stress Stages have been completed, you have the option to fail the specimen if required.