AWJM Performance of jute/polyester composite using MOORA and analytical models

Abstract

This work addresses the machinability performance of jute/polyester composites with variable laminate thickness using Abrasive water jet machining (AWJM) process. A hybrid objective function was developed using surface roughness (Ra) and kerf taper angle (Ta) and studied using a cost-effective Multi Objective Optimization by Ratio Analysis named as MOORA. The influence of machining parameters such as hydraulic pressure (P), feed rate (Vf) and standoff distance (Sd) on quality characteristics were considered for this analysis. Among all, Vf was found to be a strong influencing factor on Ta and Ra. The deviation in the magnitude of Ta and Ra was observed in the case of varying laminate thicknesses without affecting the optimum condition. Besides, a mathematical regression model was developed for both Ta and Ra based on the correlation between the dependent variables. Furthermore, two other models of Ra available in the literature were considered for comparison with experimental results. The results revealed the suitability of these models for the polymer-based fiber-reinforced composite materials, but limited to the maximum thickness of 3 mm. The good agreement of the models with two different sets of experimental values was also found.