Mts Fracture Template User Manual download pdf (Page 30)

Constant Load Control Mode Parameters

Constant Load Control Mode Paramters

DescriptionParameter

Specify the ratio of the minimum to maximum

load applied to the specimen. The minimum

FCG Load Ratio

load is determined by this value and the

maximum load is specified by you.

Specify the desired maximum load of the

command signal.

FCG End Level 1

Specify the cycle frequency of the command

signal.

FCG Frequency

Specify the wave shape of the command

signal.

FCG Wave Shape

The choices are True Sine or True Ramp.

Typically, you use a True Ramp wave shape

where uniform strain-rate sensitivity is

important, and a True Sine wave shape

where a continually varying strain rate is

acceptable because of the higher frequencies

of some tests.

This MTS template does not support hold

times or creep-fatigue crack growth testing.

Specify the percent of maximum load level

at which the voltage is measured. All voltage

FCG Measure Load Level

Percent

data below this load will not be used to

calculate crack length. This parameter is

used only for FCG DCPD tests.

Data Storage Parameters Properties

Data Storage Parameters

DescriptionParameter

Specify the percentage of precrack activity

that must complete before data is saved to

disk.

Precrack Save Percent

Limit

30 | MTS TestSuite

Fatigue Crack Growth (FCG) Template

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