Analysis of Angle of Twist of Axially Layered Functionally Graded Circular Hollow Shafts

In this study, the angle of twist of axially layered functionally gradedcircular hollow shafts subjected to a twisting torque at the free end was analyzedunder clamped-free boundary conditions using finite element software ANSYS. Thehollow shafts were made using three layers including various mixtures of ceramicand metal materials. Layer locations on the shafts were performed using L9orthogonal array based on Taguchi Method. The layer combination with optimumlevels was obtained using analysis of the signal-to-noise (S/N) ratio. Significantlayers and their percent effects on the angles of twist were analyzed using analysisof variance (ANOVA). According to results obtained, the increase of the ceramicmaterial in layers leads to the decrease of the angle of twist of the beams. The mostmeaningful layers on response were obtained as first layer with 52.83 % effectratio, second layer with 29.41% effect ratio, and third layer with 17.76 % effectratio.