Static and Dynamic Design of Fatigue Testing Machine of Specimens Due to Pure Bending

Abstract

 Due to the importance of fatigue in designing the components of machines, and due to the priority that engineers give to this subject, fatigue testing machine has been designed and manufactured. This project is based on the design and fabrication of major components of fatigue testing machine. It aims to design a machine that can test fatigue in specimens resulted from repeated pure bending. It also aims to decrease the vibrations in the apparatus to a minimum. The machine is consisted of two main subassemblies and a manual load system, in addition to rotational speed control system and revolution counter. The first one is on the right-hand side with the mass equivalent to an electrical motor on the left-hand side. The machine aims to test standard specimens of steel alloy and aluminum alloy. Speed control system aims to create a rotational speed limit of (0 - 1600 rpm). Revolution counter aims to register the number of revolutions required to achieve failure. Two types of analyses were achieved by the help of FEA software (ANSYS). The first is static study and the second is transient study, in addition to modal analysis of table testing.