Fatigue Crack Propagation under Random Loading : 1st Report : Experiment with Small Digital System

To supply data needed for the rational fatigue design of structures subject to random loads, there must be some appropriate testing methods that can reproduce a specified time history of such random variables as load, stress, strain and stress intensity factors. With a small microcomputer system alone, it is very difficult to perform exact experiments involving variations as fatigue damage accumulates in a specimen, but this report describes how two microprocessing units were used to perform experiments.