Product Description: Fatigue Crack Growth Rate Testing and Analysis

PRODUCT DESCRIPTION: Fatigue Crack Growth Rate (ASTM E647)

The FCGR software was written solely for the purposes of FCGR testing and analysis. Both steady state (K control and load control) and variable amplitude (flight spectrum) applications are available. The code is divided into two levels: ADbasic and MS Visual Basic. The ADbasic program includes high priority processes for waveform generation, control and data acquisition. MS Visual Basic processes include the analysis required to determine crack length, crack closure levels, K-control and da/dN analysis.

Features of the software include the following:

Compliance and DC potential drop methods of monitoring crack length
Precise force control and high precision data acquisition
Optimized FTA command-feedback tuning parameters for variable amplitude testing
On-line damage parameter determination for characterizing command-feedback response
Soft run-stop to minimize the effect of test interruptions
Crack closure measurement using opening load and compliance ratio (ACR) techniques
K-control including constant Kmax
Sine, triangle or user defined waveform
Digital filtering and load-displacement signal phase shift control
Data acquisition and analysis optimized according to crack growth rates
Actual maximum load and cyclic load included in the analysis data file for each data point
Versatile analysis software and Windows 3.0 Grapher software
Custom applications
Support of English and SI units

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