Abstract
For comparison, the drilling behaviour of abaca fiber-reinforced polymer (AFRP) composites and Kevlar-reinforced epoxy polymer (KFRP) composites has been studied in the specified experimental condition. The different geometrical drilling tools have been used for the investigation, namely, candlestick (T1), core (T2), standard twist drill (T3), and step cone (T4). The tool feed of 30, 45, and 60 m/min and rotational speed of 1000, 1500, and 2000 rpm have been used for the investigation. The thrust force is chosen as a response parameter for this study. The results revealed that, at lesser rotational speed and tool feed, the thrust force has declined. The result obtained correlates with the abaca fiber-based systems. However, the thrust force of KFRP is higher compared to AFRP composite systems. The axial force generated by candlestick drill is minimal compared to the other drill bits. The following may be responsible for lower thrust force: (1) the axial force distributes circumferential of the cutting tool instead of focusing at the center and (2) the interfacial adhesiveness between the matrix and the fiber is higher. The optimization of drilling process parameters, namely, tool feed and rotational speed on thrust force, has been studied. The results reveal that the tool feed contributed more to axial force compared to rotational speed.
Highlights
The drilling behaviour of abaca fiber-reinforced polymer (AFRP) composites and Kevlar-reinforced epoxy polymer (KFRP) composites has been studied in the specified experimental condition. e different geometrical drilling tools have been used for the investigation, namely, candlestick (T1), core (T2), standard twist drill (T3), and step cone (T4). e tool feed of 30, 45, and 60 m/min and rotational speed of 1000, 1500, and 2000 rpm have been used for the investigation. e thrust force is chosen as a response parameter for this study. e results revealed that, at lesser rotational speed and tool feed, the thrust force has declined. e result obtained correlates with the abaca fiber-based systems
The thrust force of KFRP is higher compared to AFRP composite systems. e axial force generated by candlestick drill is minimal compared to the other drill bits. e following may be responsible for lower thrust force: (1) the axial force distributes circumferential of the cutting tool instead of focusing at the center and (2) the interfacial adhesiveness between the matrix and the fiber is higher. e optimization of drilling process parameters, namely, tool feed and rotational speed on thrust force, has been studied. e results reveal that the tool feed contributed more to axial force compared to rotational speed
3.1. e Influence of Different Drill Geometries on Axial Force during Drilling of KFRP Composite. is section comprises the optimization of process variables, namely, thrust force and torque during drilling of Kevlar and abaca epoxy composites. e different geometries drill tools that have been utilized for the experimentation are T1, T2, T3, and T4 drill bits
Summary
Comparative Analysis of Drilling Behaviour of Synthetic and Natural Fiber-Based Composites. E optimization of drilling process parameters, namely, tool feed and rotational speed on thrust force, has been studied. E thermal and mechanical responses of functional graded composite materials are compared with carbon- or glass-based composites Drilling parameters such as thrust force, diameter of hole, delamination factor, and roundness during drilling operation are considered for experimental analysis. E effect of hole-making process parameters, namely, cutting speed, tool feed, and drill bit geometry, on axial force and torque has been investigated. E influence of hole-making process parameters on tool wear torque and axial force during drilling of coir fiber-based composites is predicted by a mathematical model. E effect of input process parameters of drilling, namely, specimen thickness, tool feed, and drill rate, on delamination of glass fiber-based composites is studied. Four different geometries of drill tools used for the experiments are T1, T2, T3, and T4 [33]. e rotational speed, tool feed, and dill diameter chosen with three levels and four dissimilar geometries of special drill tools are displayed in Table 2. e combination of three ranges of rotational speed and tool feed is utilized to perform nine holes in the specimen
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