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A computer program was developed for data acquisition and control of axial-torsional fatigue experiments at NASA-Lewis Research Center. The multitasked, interrupt-driven program was written in PASCAL and assembler. This program is capable of dual-channel control and six-channel data acquisition. It can be utilized to perform in-phase and out-of-phase axial-torsional isothermal fatigue or deformation experiments. The program was successfully used to conduct in-phase axial-torsional fatigue experiments on 304 stainless steel at room temperature and on Hastelloy X at 800°C. This paper describes the details of the software and gives some of the results generated to date.
axial-torsional fatigue, computer-control, data acquisition, in-phase test, out-of-phase test, software development, multitasking, hysteresis loops, fracture testing, fatigue testing, automation
Research engineer, Sverdrup Technology, Inc., NASA-Lewis Research Center Group, National Aeronautics and Space Administration, Cleveland, OH
Research engineerPropulsion Directorate, U.S. Army Aviation Research & Technology Activity (AVSCOM)NASA-Lewis Research Center, National Aeronautics and Space Administration, Cleveland, OH