Evaluation of geometrical quality characteristics in pulsed Nd:YAG laser cutting of Kevlar-29/Basalt fiber reinforced hybrid composite using Grey relational analysis based on genetic algorithm

Gautam, Girish Dutt; Mishra, Dhananjay R.

doi:10.5937/fmet1903560g

Cited by 21 publications

(8 citation statements)

References 30 publications

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“…grey relational analysis (GRA) and genetic algorithm (GA). In this approach, GRA is used to identify relationships between process parameters and output responses [14,[22][23]. Calculated grey relational grades considered as a single performance quality index for all responses.…”

Section: Grey Relational Based Genetic Algo-rithm (Grga) Optimizationmentioning

confidence: 99%

“…They also found that pulse frequency has negligible effects on all kerf quality characteristics. In another study, Gautam and Mishra [14] performed the laser cutting of 1.35 mm thick Kevlar-29 and Basalt fiber based hybrid composite sheet. They observed that the geometrical accuracy of the cut not only affected by the laser cutting parameters but also by the specific properties of Kevlar-29 and basalt fibers with epoxy resin.…”

Section: Introductionmentioning

confidence: 99%

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Multiple kerf quality optimization in laser cutting of BFRP composite using grey relational based genetic algorithm

Dutt¹,

Mishra²

2020

FME Transactions

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In laser beam machining, the geometrical precise cutting of fiber reinforced polymer (FRP) composite materials is a challenging task in order to produce a higher quality cut. The aim of the present research is to determine optimum levels of cutting parameters able to provide geometrically accurate cut for 1.60 mm thick Basalt Fiber Reinforced Polymer (BFRP) composite laminate. The total of 42 experiments have been performed on a 250W pulsed Nd:YAG laser system. During experimentation, the lamp current, pulse width, pulse frequency, compressed air pressure and cutting speed have been varied to evaluate different kerf quality characteristics such as top and bottom kerf width, top & bottom kerf deviation, and kerf taper. Experimental results have been used to single index optimization of evaluated multiple kerf quality characteristics. A hybrid grey relational analysis coupled with genetic algorithm approach has been adopted for the optimization. The optimum levels of cutting parameters have been found at moderate lamp current (184.5 Amp), lower pulse width (2 ms), compressed air pressure (8 kg/cm 2) and cutting speed (50 mm/min) and higher pulse frequency (30 Hz). Finally, confirmation experiments have been conducted and it has been observed that optimal levels of cutting parameters are able to improve top kerf width, bottom kerf width, top kerf deviation, bottom kerf deviation, and kerf taper by 13.33 %, 13.29 %, 23.52 %, 23.07 %, and 10.83 %, respectively. From the experimental results, it has been found that lamp current is the most significant parameter for all kerf quality characteristics.

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Section: Grey Relational Based Genetic Algo-rithm (Grga) Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiple kerf quality optimization in laser cutting of BFRP composite using grey relational based genetic algorithm

Dutt¹,

Mishra²

2020

FME Transactions

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“…Mishra et al [29] while cutting Basalt, Glass, and Kevlar-29 fibres hybrid composite employing Nd: YAG laser to optimize TKW & BKW with the help of GRA to optimize the parameter. They reported a substantial increase in the top & bottom kerf deviations of 18.64 percent and 10.34 percent respectively.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective Optimization of Kerf-taper and Surface-roughness Quality Characteristics for Cutting-operation On Coir and Carbon Fibre Reinforced Epoxy Hybrid Polymeric Composites During CO2-Pulsed Laser-cutting Using RSM

Singh

Sharma

et al. 2021

Lasers Manuf. Mater. Process.

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Current research focuses on optimizing various quality characteristics for kerf geometry generated through laser cutting of Coir fibre/carbon fibre/epoxy resin hybrid composite adjacent to straight cut profile employing pulsed CO2 laser system. The Kerf taper (KT) and the Surface roughness (SR) are the main quality parameters discussed. Dependent on significant process parameters, namely gas pressure, cutting speed, pulse frequency and pulse width predictive models were developed. In accordance with Taguchi's L9 orthogonal array (OA), the cutting trials are designed. Process-parametric optimization was performed using Response Surface Methodology (RSM). Furthermore, experiments were performed to obtain experimental data for the analysis of cut quality features. The impact of the input variables on the response characteristics is also explored. The morphological characterizations have been performed to analysis the effect of machining-variables and cut-quality for the top and bottom kerf widths with various laser cutting variables in the pulse laser-cutting of Coir-fibre/carbon-fibre/epoxy-resin hybrid composite. For SR and KT, the developed second order surface response model was found very successful. The optimal levels of cutting variables for KT are established at Gas pressure-6 N/mm2, pulse width-2.04 ms, cutting speed-8.01 mm/s, pulse frequency-15 Hz, for sample A1, Gas pressure-5.47 N/mm2, pulse width-2.5 ms, cutting speed-8.81 mm/s, pulse frequency-8.43 Hz, for sample A2, Gas pressure-3.85 N/mm2, pulse width-1.5 ms, cutting speed-9.06 mm/s, pulse frequency-5 Hz, for sample A3 additionally for SR Gas pressure-2 N/mm2, pulse width-1.5 ms, cutting speed-7 mm/s, pulse frequency-5 Hz, for sample A1, Gaspressure-2.36 N/mm2, pulse width-1.5 ms, cutting speed-7 mm/s, pulse frequency-15 Hz, for sample A2, Gaspressure-6 N/mm2, pulse width-1.5 ms, cutting speed-11 mm/s, pulse frequency-8.73 Hz, for sample A3. Regression results and linear and square impact of laser cutting variables have been revealed to be important to validate the model.

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“…A very less amount of work has been found in the field of laser cutting of hybrid composite materials. Gautam and Mishra [12] performed pulsed Nd:YAG laser cutting on 1.35 mm thick Kevlar-29 and Basalt fiber based hybrid composite sheet. They evaluated the geometrical accuracy of the cut in the terms of kerf width, kerf deviation, and kerf taper.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Kerf deviations in pulsed Nd:YAG laser cutting of Hybrid composite laminate using GRA

Mishra¹,

Girish²,

Prakash³

et al. 2020

FME Transactions

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The aim of this research is to identify the optimum levels of leading laser cutting parameters for accomplishing precise cut geometry with better quality for cutting of newly developed Basalt-Glass-Kevlar 29 hybrid FRP composite laminate. The total of 42 experiments have been performed on a 2.34 mm thick laminate using a 250W pulsed Nd:YAG laser cutting system. Lamp current, pulse width, standoff distance, compressed air pressure, and cutting speed have been selected as variable laser cutting parameters. Thereafter, grey relational analysis approach has been adopted to single index optimization of top and bottom kerf deviation, simultaneously. These optimal solutions have been validated by comparing the results of confirmation experiments and found satisfactory improvement. Standoff distance has been observed as the most influencing parameter for both top and bottom kerf deviation.

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Evaluation of geometrical quality characteristics in pulsed Nd:YAG laser cutting of Kevlar-29/Basalt fiber reinforced hybrid composite using Grey relational analysis based on genetic algorithm

Cited by 21 publications

References 30 publications

Multiple kerf quality optimization in laser cutting of BFRP composite using grey relational based genetic algorithm

Multiple kerf quality optimization in laser cutting of BFRP composite using grey relational based genetic algorithm

Multi-objective Optimization of Kerf-taper and Surface-roughness Quality Characteristics for Cutting-operation On Coir and Carbon Fibre Reinforced Epoxy Hybrid Polymeric Composites During CO2-Pulsed Laser-cutting Using RSM

Optimization of Kerf deviations in pulsed Nd:YAG laser cutting of Hybrid composite laminate using GRA

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