Study on Krouse Type Bending Fatigue Tester for Obtaining Fatigue Life Curve

Abstract

Equipment of conventional fatigue test machines are typically expensive. A testing professional is required for obtaining the fatigue life curve of testing machines and this process is time-consuming and expensive. Moreover, it is difficult to build test equipment in general laboratories and universities. Therefore, in this study, Krouse type small bending fatigue tester with simple structure, in which the load can be adjusted by adjusting the displacement, has been proposed and developed. For fatigue test, PCM and STS430 test pieces were developed and tensile test was conducted; a fatigue life curve was obtained through fatigue test. Comparative analysis was made using the formula used to evaluate the maximum bending stress of a single arm beam, finite element analysis, and S-N Curve, and the reliability of the corresponding fatigue tester was reviewed.