Design of a data acquisition and reduction system for fatigue testing
designofdataacqu00dalt.pdf (3.737Mb)Abstract
A data acquisition and reduction system has been created for aircraft materials fatigue testing. The system uses HP-9835 Desktop Calculator, an HP-2240A Measurement and Control Processor and a Materials Testing System loading machine. Three different computer programs on the HP-9835 are used to analyze material properties, simulate inflight fatigue loading and compute fatigue damage at a stress concentration. The flight loads are selected from Mil Spec 8866 and applied in a random order. The fatigue damage at a stress concentration is calculated from the applied local stresses using Miner's Law.
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