Abstract
Fatigue failure in dynamic structures occurs because of continuous cyclic loading; especially bending fatigue often takes place depending upon the loading under yield and ultimate strength of the material. Generally, fatigue data of material is not commonly accessible because of lengthy experimentation and unavailability of testing machines. There are some fatigue testing machines that are available with complex mechanism and data acquisition system at high operating cost. The research work presents design and development of a plane bending fatigue testing machine with simple operating mechanism and data acquisition unit to obtain fatigue life of isotropic and orthotropic material at comparatively low operating and manufacturing cost. The machine is designed with the application of DFMA principles, manufactured, assembled, and tested for design specifications and performance which includes measurement of angular displacement, speed setting, load measurement, and vibrations generated. At the end, the performance of the machine is tested with the experimental work on fatigue testing of Al alloy for plane bending. The testing performance is considered satisfactory, and an economical and accurate testing setup is developed.
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