Design Optimization of Knuckle Stub Using Response Surface Optimization

The knuckle stub is one of the vital components of steering assembly of ATV. The current research investigates the strength and safety factor of knuckle stub subjected to structural loads using techniques of finite element method. The CAD model is developed in ANSYS design modeler and analyzed in workbench. The design is then optimized using Taguchi response surface method using optimal space filling algorithm. The RSM optimization generated specific set values for optimization variables (major length and taper length) along with sensitivity plot and goodness of fit curve. The response surface plot for equivalent stress shows that maximum equivalent stress is observed for Mlength value ranging from 23 to 23.375 mm and Tlength value ranging from 28 to 31 mm. The optimized design of stub resulted in 2.72% mass reduction and 7.65% deformation reduction, while stress reduction of 13.54% is observed of stub.