Mts Fracture Template User Manual download pdf (Page 35)

Crack Size Check Parameters

DescriptionParameter

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

DescriptionParameter

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

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Mts Fracture Template User Manual Page 35