MTS Fatigue Template - Manual (Page 33)

The Strain Full Scale window appears.
6. You may want to set this value to 0.1 and click OK.
The Extensometer Verification Prompt window appears.
7. Click to repeat the extensometer verification or click No to continue.
5.2.6.0 Modulus Check at Start Temperature
You should perform a modulus check before you run a test. The standard template allows you to check the
modulus at start temperature and test temperature (for elevated temperature tests). The start temperature
modulus check helps determine if the system is set up correctly. For example, if you have not pulled the zero
pin from your extensometer, the modulus is incorrect. If you type incorrect specimen dimensions, the modulus
is incorrect.
5.3.0 Run the Test
5.3.1.0 Measure Modulus
To check the modulus in the LCFS test:
1. Click Measure Modulus.
The MTS TestSuite Input Parameters window prompts you to enter a load value to ramp to for a modulus
check.
2. Enter a load value and click OK.
3. Click the Run button.
4. A window appears with the Modulus Check Result.
• Click Accept to accept the result.
• Click Reject to discard the result.
• Click Measure Modulus to perform the modulus check again.
• Click View Data Report to see the results in report form.
5.3.2.0 Strain-Controlled Test
A typical low-cycle fatigue (LCF) test sequence includes:
1. Ramp to mean level, if the mean level at the start of the test is not zero. All data recorded during the ramp
is stored in cycle number 0 (zero).
2. Identify a stable cycle for comparison with other test values.
3. Start the test cycle count, start test data collection, and run the test to completion.
4. Ramp the system to the mean load of the last cycle.
MTS TestSuite 33
5.0 ASTM Low-Cycle Fatigue (LCF) Strain Template