This research is centered on the design of a low–cost cantilever loading rotating bending
fatigue testing machine using locally sourced materials. The design principle was based on
the adaptation of the technical theory of bending of elastic beams. Design drawings were
produced and components/materials selections were 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; were fabricated and then assembled following the
design specifications. The machine performance was evaluated using test specimens which
were machined in conformity with standard procedures. It was observed that the machine has
the potentials of generating reliable bending stress – number of cycles data; and the cost of
design (171,000 Naira) 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.
K. K. Alaneme, S. M. Hong, Indrani Sen, E. Fleury, and U. Ramamurty, Effect of Copper Addition on the Fracture and Fatigue Crack Growth Behaviour of Solution Heat-Treated SUS 304H Austenitic Steel, Materials Science and Engineering: A 2010, 527: 4600 – 4604.
Y. Akiniwa, S. Stanzl –Tschegg, H. Mayer, M. Wakita, and K. Tanaka, Fatigue Strength of Spring Steel under Axial and Torsional Loading in the very High Cycle Regime, International Journal of Fatigue, 2008, 30: 2057 – 2063.
D. Brandolisio, G. Poelman, G. De Corte, J. Symynck, M. Juwet, and F. De Bal, Rotating Bending Machine for High Cycle Fatigue Testing, Department of Mechanical Engineering, KaHo Technological University Sint-Lieven Ghent, Belgium, 2007.