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TESTING SERVICES
The lab at FTA employs automated techniques developed by Keith Donald for a variety of fracture mechanics applications, including fatigue crack growth rate testing (ASTM E647) and non-linear fracture toughness testing (ASTM 1820 and 1921). Both steady state and variable amplitude methods are supported.




Capabilities
Testing is carried out on ten computer-controlled servo-hydraulic mechanical test systems, with load capacities up to 50,000 lbs. Each load frame has a selection of load cells for precision load control. Temperature capability of -300 degrees F to +1900 degrees F is available. We have a full assortment of fixturing available for common test geometries including compact tension, surface flaw, center crack, corner crack, single edge crack, and bend bars. Testing is possible in a wide variety of environments, including high humidity and saltwater. All frames are controlled using FTA's proprietary software and systems.

Testing techniques
Standard ASTM E647 testing is carried out under K-control (constant R or constant Kmax) and constant load. Customers are typically provided with a complete da/dN curve including near-threshold, region II and region III data. Specialty testing to customer requirements is available. We also routinely offer: Crack lengths are monitored using compliance and DC potential drop techniques.

Testing is carried out according to well-documented procedures made available to customers at all times. Procedures are unique to to each program and are derived from best practice; applicable ASTM standards; and particular customer requirements.



FTA
home page
About FTA Testing
services
Software
systems
Contact
FTA