Mts Fracture Template User Manual download pdf (Page 64)

DescriptionParameter

Specify the percentage of the measured load

range used as the upper limit for linear least

Precrack Upper Least

Squares Fit Percentage

squares fit compliance determination. This

parameter is not used for FCG DCPD tests.

Specify the percent of maximum load level

at which the voltage is measured. The load

Precrack Measure Load

Level Percent

is applied at this level to ensure the crack is

open. All voltage data below this load will not

be used to calculate crack length. This

parameter is used only for FCG DCPD tests.

Specify the number of cycles at which

precrack activity stops.

Precrack Cycle Limit

Specify the maximum stress intensity desired

at the end of precrack activity. The initial

Precrack Final Maximum

precrack Maximum K is 1.4 times the Final

Maximum K value.

Select Yes to cause an interlock at the end

of precrack. This can shut down hydraulics,

if desired.

Shutdown Station at End

of Precrack

KIC Parameters

In the KIC Parameters section of the main menu, you specify the KIC Force Ramp Rate, which is the rate

for the ramp segment of the KIC step.

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

Specify the cycle intervals written to disk

during the precrack activity.

Store Every Nth Precrack

Cycle

Specify the amount of crack length change

that will cause data to be stored to disk.

Crack Size Change Store

64 | MTS TestSuite

KIC Fracture Toughness Template

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