MTS Multipurpose Simulated - Manual (Page 81)

Description Parameter
Specify the modulus used for crack size
calculations. Elastic Modulus
Specify the percent of load applied on the
specimen in order to check the crack size. Ramp to Percent
The load is ramped from zero to the specified
percentage of load. The percentage is based
on the last load command.
Specify the time to ramp to the target load. Ramp Time
5.5.3.3.0 Precrack Specimen
1. Click Precrack in the Main Menu window.
2. Click Run on the control panel to start the precrack activity. Optionally, if you want to review or change
parameters, click Return to Main Menu.
To suspend the activity after it has started to run, click Hold. When you suspend the activity, data collection
stops and the application attempts to hold at the mean level.
To stop the activity, click Stop. When you stop the activity, the application immediately ramps to zero load
and saves the test data.
3. To review the process of the precrack activity, monitor the runtime displays.
4. Typically, the activity stops when a desired precrack parameter is achieved. In this case, review the activity
end result, and then click Close.
5. Check the precrack results, and if necessary, correct the values.
5.5.3.4.0 Run JIC Fracture Toughness Test
1. Perform the crack size check at least three times after precracking the specimen.
This must be done to run the JIC test.
2. Click JIC Test.
3. Click Run on the control panel to start the test activity. Optionally, if you want to review or change
parameters, click Return to Main Menu.
To suspend the activity after the activity starts, click Hold. When you suspend the activity, data collection
stops and the application attempts to hold at the mean level.
To stop the activity, click Stop. When you stop the activity, the application immediately ramps to zero
command and saves the test data.
4. Review the process of the test activity by monitoring the runtime displays.
• Monitor Axial Force, Axial COD, Axial Displacement values.
• Monitor Axial Force versus Time plot.
• Review Summary table.
• Review Statistics table.
MTS TestSuite 81
5.0 Running Simulation Tests