MTS Fracture Template - Manual (Page 35)

Crack Size Check Parameters
Description Parameter
Specify the crack size used to calculate the
elastic modulus. The default value is equal
to the specimen notch size. Entered Crack Size
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
1. Click Measure Crack Size.
2. Click Run on the control panel to start the crack size check. Optionally, if you want to review or change
parameters, click Return to Main Menu.
3. When finished with this activity, click Close.
Entering DCPD Initial Crack Values
This activity applies a load to the specimen and measures the initial voltage across the specimen crack
for DC Potential Drop (DCPD) tests.
1. On the main menu, click Enter Initial Crack.
2. Specify the following parameters, and then click OK. The parameters determine the load level that is
applied and how the voltage is measured.
DCPD Initial Crack Value Parameters
Description Parameter
On/Off—Turn the current that is applied to
the specimen on and off. DCPD Voltage Option
Reverse—Reverse the current that is applied
to the specimen.
Always On—Do not turn the current Off.
This is rarely used with moderns hardware,
but is available for older, legacy hardware.
Specify the crack size that was used to
perform the voltage-to-crack-size calibration. Initial Crack Size
MTS TestSuite | 35
Fatigue Crack Growth (FCG) Template