TestResources test systems are the foundation of new research directed at improving and understanding the mechanical behavior of metals at the University of Arkansas. Both room and high temperature tests are performed in time-dependent fracture mechanics and low - cycle strain controlled fatigue. The results of these experiments will contribute to development of microstructure-property relationships, reliability and risk analysis and life extension of aging structural components.
One TestResources system has been optimized for ambient and high temperature strain controlled low - cycle fatigue tests. The system includes special, hydraulically operated mechanical grips that speed the test sample insertion while maintaining critical alignment and zero-backlash needed for the test – which cycles back and forth from tension into compression. Test sample insertion takes minutes and can be done by students with virtually no effort. The system includes fatigue test software that controls the test and analyses results automatically according to ASTM E606.
A second TestResources system is specially configured to perform high precision fracture tests with software, instrumentation, and mechanical accessories capable of elevated temperature tests to 1000C. Crack growth is measured using a special high temperature clip on displacement gage that measures load line displacement. The system also permits simultaneous application of reverse switching potential drop instrumentation monitored via application software. Precision measurements are then possible using both compliance and PD measurement schemes - with associated special applications software. There are very few re s earch institutions in the world capable of doing such precise work at elevated temperature.
‘The key to the effectiveness of both systems is the effort we put into understanding Dr. Saxena's research and then integrating all the components into effective final solutions' states Dr. Sunder, technical leader on the project. In addition, Bob Brosch, president of TestResources states that “this particular installation featured many enhancements to our servohydraulic testing product line."
The hardware and software associated with the project were developed by the TestResources Asia-Pacific development center located in Bangalore, India. |