ABSTRACT
Functionally graded materials (FGMs), such as bones and teeth, exist in the human body; these materials are designed to meet functional requirements. As revolutionary materials, functionally graded materials are a set of advanced materials with properties changing over a varying dimension. The difference between FGMs and composite materials is that sharp interfaces exist in composites, which cause fracture and failure. On the other hand, FGMs have a smooth transition from one material to another by using a gradient interface. Spur gears have a wide range of applications in power transmission. The hardworking conditions of the spur gears require them to resist tooth deflection and stress concentration, which demand that the gear material has sufficient strength. A functionally graded material is a revolutionary material and was selected for fabricating a spur gear in this study; the gear was simulated using two different methods.
