Abstract

From the decades of moving machine elements become more important and lifetime approach in fatigue design based on S-N curves establishes for an infinity life where the applied stress cycle is below than endurance limit. After fatigue test in results we got the fatigue failure beyond 106 cycles even this test indicates there is no endurance fatigue limit, from the various servo-hydraulic testing machine we got the late results and its very time consuming as well as expensive tests. Reciprocating fatigue testing equipment for laboratory use is a new generation of devices designed to perform tests in a very short time. This thesis describes the design and assembly of reciprocating fatigue testing equipment working at 50 kHz. From this research paper, the obtained designed is a complete balanced system of a forced control unit and implemented on purely mechanical fatigue test equipment is design and developed. This testing machine consist a revolution counter, electric motor, pulley system and an external mechanical structure to hold the specimen which is the main reason for the overall cheap price. The result of this study will contribute to prolonged use of fatigue testing equipment.

Keywords: fatigue test, reverse axial loading machine, s-n curve, reciprocating fatigue testing