FLcgs Software
FractureLab & Advanced Fracture Mechanics Associates have teamed up to develop a fatigue and fatigue crack growth customizable software.
Identifying the Demand
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VHCF crack growth testing up to 750 Hz
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Test customization
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Prompt, regular customer support
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Multiple, unattended test segment capability
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Automated crack segment marking-heat tint/stress ratio that is material and geometry dependent.
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Stop criterion as a percentage change over initial PD / compliance.
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Flexible postprocessor that accepts current and legacy controller input.
Delivering the Solution
Next generation mechanical test controller built from the ground up:
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ADwin Gold, -X support (USB and Ethernet)
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Servo-hydraulic and piezo actuator compatibility
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Static, cyclic / dwell fatigue / fatigue crack growth
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User defined wave forms
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Queuing system for multiple test segments
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Crack length measurement input options (compliance, BFSG, DCPD, hyper-DCPD)
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Plastic zone based alternate K gradient to mitigate remote closure
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3-wire active and reference PD solutions
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Pre-verification of load and K prior to control switch
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Autonomous (device based) test capability; can disconnect computer
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Program/computer crash recovery to continue test or retrieve data
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Automated test segment marking
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Regular real-time log file updates
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Multiple output formats (.xml for postprocessor, .csv / .log for user analysis)
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Fatigue crack growth data ASTM E647 compatible postprocessor software:
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Multiple input options (FLcgs log file / .csv, .xml, and legacy .in3 / .in4)
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Input data point selection / omission options prior to analysis
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Optional back face correction for surface flaw specimens
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Visual correction (constant and linear)
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Opening Load, 2/pi, ACR, conventional
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Stress ratio normalized K for master curve
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Full menu of da/dN analysis options (secant, modified secant, 7 point polynomial, modified 7 point combo)
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Threshold Paris Law fit
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Exportable output plots with pan / scale / zoom flexibility
Latest Releases
CONTROLLER
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v.20250807: Metric units, eff. B, W correction
- GUI: Added metric unit capability to GUI for crack length and K calculations
- GUI: corrected "effective' B, W calculations based on inner R / outer R values
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v.20250627: Time stop criterion fix
- GUI: added calculation of time_remaining when adjusting time based stop criterion in setConfiguration() to avoid premature stoppage.
- GUI: moved assignment of stop criterion values to BEFORE assignment of stop criteria types (again to prevent early stoppage).
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v.20250623: minor GUI fix
- GUI: re-sized the stop criteria tab to fit properly
- GUI: corrected device number from 0x150 to 0x1 (default ADX)
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​POSTPROCESSOR
v.20250807: Postprocessor metric units
- introduced metric unit capability
- fixed log / csv import function to properly update crack length and K calculation options
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v.20250721: .in4 converter edit
- added carriage return at the end of converted .in4 files to make compatible with older versions of legacy postprocessor software.
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v.20250625: Eliminated "update lookups" button
- oversight from previous release; was no longer needed
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v.20250623: improved LUT updater
- changed connectSignals to activate menu option to update ALUT and KLUT when specific text fields are edited.
- execution of code automatically propagates changes in the GUI to the LUT generators and the dataframes with the exception of user generated lookups
- original command to warn users to update LUTs on their own is deleted
- "update LUT" menu options deactivated during file load / import (i.e. initial population of input fields)
- filenames are automatically generated for SAVE commands based on the input filename with *_processed.csv suffix
- assorted code cleanup (commented blocks)
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