Fuzzy Based Optimization of Thrust Force and Torque during Drilling of Natural Hybrid Composites

Abstract

This investigation was done to study machinability during drilling on sandwichlaminates. Vetiver and jute were used as natural fibers and glass was used as synthetic fibers in vinyl ester matrixin the form oflaminatesby varying the fiber content in each laminate.The laminateswere drilled during which spindle speed, spindle feed rate, tool point angle and sample laminate weremodified using D-optimal design technique. During drilling of each hole, thrust force impressed and torque developedwere noted as outputs.The outputswere optimized to observe best drilling conditions.A fuzzy model was created and its predictions for trialconditionswere noted. A comparison between trial values, regression values and fuzzy values was made. Confirmatory trialswere madefor optimumset of runs and outputswere again noted.The percentage of error between the model, confirmatory trials and fuzzy were found to be meagre and hence concluded that the optimization was satisfactory.