Abstract

This project is centred on the design of a low–cost cantilever loading rotating bending fatigue testing machine using locally sourced materials. The design principle is based on the adaptation of the technical theory of bending of elastic beams. Design drawings are produced and components/materials selections are based on functionality, durability, cost and local availability. The major parts of the machine: the machine main frame, the rotating shaft, the bearing and the bearing housing, the specimen clamping system, pulleys, speed counter, electric motor, and dead weights; are fabricated and then assembled following the design specifications. The machine performance is evaluated using test specimens which are machined in conformity with standard procedures. It is observed that the machine has the potentials of generating reliable bending stress – number of cycles data; and the cost of design was lower in comparison to that of rotating bending machines from abroad. Also the machine has the advantages of ease of operation and maintenance, and is safe for use.

Authors and Affiliations